Critical reasoning (assumptions): For the statement "Films have become indispensable for the entertainment of people.", determine which assumption is implicit from the pair given (I: Films are the only media of entertainment. II: People enjoy films) and select the most logically valid choice.

Given data

• Statement: Films have become indispensable for the entertainment of people.
• Assumption I: Films are the only media of entertainment.
• Assumption II: People enjoy films.

Concept/Approach
The implicit assumption test checks which unstated belief must be true for the statement to make sense. If denying an assumption makes the statement pointless or incoherent, that assumption is implicit.

Step-by-step reasoning
1) The word 'indispensable' means 'cannot be done without' for the stated purpose (entertainment).2) For films to be indispensable for entertainment, it must at least be true that people derive entertainment from films (i.e., they enjoy them) — otherwise calling them indispensable for entertainment would be irrational. Hence, Assumption II is required.3) Assumption I ('only media') is stronger than the statement. Something can be indispensable without being the only medium (e.g., a core component among several). Thus, I is not necessary.

Verification/Alternative
Deny II: If people do not enjoy films, films cannot be indispensable for entertainment — contradiction. Deny I: Even with other media (music, sports), films may still be considered indispensable — no contradiction.

Common pitfalls

• Equating 'indispensable' with 'only'. Logical necessity does not imply exclusivity.
• Ignoring the audience response embedded in entertainment claims (enjoyment).

Final Answer
Only assumption II is implicit.