Statement: Being unable to schedule adequate training sessions for the national team, country X has decided not to defend the LG Cup it won last year in city Z.\nAssumptions:\nI. Without playing several matches against major soccer-playing nations, defending the LG Cup would be futile.\nII. Entering the tournament underprepared may result in failure for country X.

Introduction / Context:
Withdrawing from a title defense due to inadequate preparation is a risk-management decision. The statement links training shortfall to the strategic choice not to compete. We must find which assumption(s) are necessary to make this reasoning coherent.

Given Data / Assumptions:

• The team lacks adequate training sessions.
• Decision: do not defend the LG Cup this year.
• No explicit claim about the necessity of playing “several matches against major nations.”

Concept / Approach:
In statement–assumption items, an assumption is implicit if, without it, the decision would lose rationale. The minimal belief here is that competing while underprepared materially increases the risk of failure. Stronger specifics (like which opponents to face) are not required for the withdrawal to make sense.

Step-by-Step Solution:
1) The choice not to defend implies organizers believe underpreparedness lowers win probability significantly.2) This aligns with Assumption II: inadequate preparation may lead to failure.3) Assumption I is narrower and prescriptive (must play several matches vs major nations). The statement doesn’t hinge on that specific pathway; many training modalities exist.

Verification / Alternative check:
Even with no friendlies against top nations, a team could still prepare via camps, analysis, or domestic tune-ups. The key is overall preparedness, not that single route.

Why Other Options Are Wrong:

• Only I: Too specific and unnecessary.
• Either / Both: Overstate necessity; II suffices.
• Neither: Denies the basic risk premise behind the withdrawal.

Common Pitfalls:
Confusing a recommended method of preparation with the essential assumption (that poor prep risks failure).

Final Answer:
Only assumption II is implicit.