In this sentence arrangement question, the first segment is fixed as "It was hard for the Afghans". The remaining segments are: (P) leading to the subtle plummeting of the morale, (Q) to withstand the wave after wave of enemy attacks, (R) their plight further worsened the situation, and (S) and the indifference of the allies towards. Rearrange P, Q, R, and S so that the full sentence becomes meaningful and grammatically correct.

Introduction / Context:
This rearrangement question describes the difficult situation faced by Afghans under repeated attacks and lack of support from allies. You must organize four fragments after a fixed opening to express what they were facing and what effect this had on their morale. The goal is to reach a logically flowing sentence that clearly links enemy attacks, indifference of allies, worsening plight, and declining morale.

Given Data / Assumptions:

• Fixed opening: "It was hard for the Afghans".
• P: "leading to the subtle plummeting of the morale".
• Q: "to withstand the wave after wave of enemy attacks".
• R: "their plight further worsened the situation".
• S: "and the indifference of the allies towards".
• The sentence should describe what was hard for them, additional factors, and the final effect.

Concept / Approach:
A well formed sentence should first explain what exactly was hard for the Afghans. That is followed by any additional cause phrases joined with a conjunction, for example "and". After stating the main difficulties, the sentence should move to consequences such as worsening of the situation and fall in morale. Grammatically, the structure "to withstand" completes "It was hard for the Afghans", while "and the indifference of the allies towards" must be followed by a noun like "their plight". Finally, "leading to the subtle plummeting of the morale" works as a result clause.

Step-by-Step Solution:
Step 1: Complete the phrase "It was hard for the Afghans" by adding an infinitive. Segment Q begins with "to withstand", which fits perfectly: "It was hard for the Afghans to withstand the wave after wave of enemy attacks". Step 2: The Afghans were not only facing enemy attacks, they were also facing indifference. Segment S adds this with a conjunction: "and the indifference of the allies towards". Place S after Q. Step 3: The phrase "towards" needs an object, supplied by segment R: "their plight further worsened the situation". This gives "and the indifference of the allies towards their plight further worsened the situation". Step 4: Finally, mention the ultimate result of attacks and indifference. Segment P expresses this: "leading to the subtle plummeting of the morale". Step 5: The resulting sentence is: "It was hard for the Afghans to withstand the wave after wave of enemy attacks and the indifference of the allies towards their plight further worsened the situation, leading to the subtle plummeting of the morale." The sequence is QSRP.

Verification / Alternative check:
If you start with P directly after the fixed part, you get "It was hard for the Afghans leading to the subtle plummeting of the morale", which does not clearly state what was hard. If R comes immediately after the opening, the sentence jumps to "their plight further worsened the situation" without saying what made it hard for them. Moreover, if you place P or R before S, the preposition "towards" is left incomplete. The only arrangement that respects all grammatical links and logical cause effect relationships is Q followed by S, R, and P.

Why Other Options Are Wrong:
PQRS begins with a result clause without specifying the main difficulty and leaves "towards" unmatched.

RQPS places "their plight further worsened the situation" immediately after the opening, which is abrupt and ignores the attacks and indifference sequence.

SRPQ starts a new phrase "and the indifference of the allies towards" without any prior reference to what else was happening, and again mishandles the completion of "towards".

Common Pitfalls:
Many test takers do not pay attention to small words like "to" and "towards". These words strongly guide which segment can logically follow. When you see "It was hard for the Afghans", you should look for an infinitive such as "to withstand". When you see "towards", you should look for a noun or noun phrase that is the object of this preposition. Following these grammatical signals makes such rearrangement questions much easier.

Final Answer:
The correct order of segments is QSRP, so option A is correct.