Statement — “Exercise is necessary to maintain good health,” says the advertisement. Assumptions — I. Exercise is a prerequisite for good health. II. Advertisements like this can influence people at least to some extent.

Introduction / Context:
Promotional statements typically rest on two pillars: the substantive claim (here, the health value of exercise) and a pragmatic belief that messaging can influence audience behavior. The advertisement’s force relies on both.

Given Data / Assumptions:

• Claim: “Exercise is necessary to maintain good health.”
• Assumption I: exercise is indeed a prerequisite (normative medical stance, as presupposed in the ad).
• Assumption II: advertisements affect at least some people’s attitudes or behavior.

Concept / Approach:
For the ad to be meaningful, the issuer must believe the propositional content (I) and also believe that broadcasting it has some effect (II). If either were missing, the choice to advertise would be irrational or insincere.

Step-by-Step Solution:

Verification / Alternative check:
Even if the ad were persuasive to only a fraction of viewers, II still holds because it claims some effect, not universal success.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing “necessary” with “sufficient.” The statement uses “necessary,” not “sufficient,” but the assumption is about the advertiser’s belief, not logical modality.

Final Answer:
Both Assumption I and II are implicit.