Statement–Assumption (Ad: “Z TV lets you watch two programmes simultaneously”): Statement: “‘Z’ TV is the only TV that gives viewers a chance to watch two programmes simultaneously,” says an advertisement. Assumptions: I) Sales of ‘Z’ TV may increase due to the advertisement. II) Some people will be influenced by the ad and buy ‘Z’ TV. III) Sales of ‘Z’ TV may currently be declining.

Introduction / Context:
Advertisements highlight differentiating features to drive sales. The claim here is exclusivity (“only TV” with dual-program viewing). We must identify premises that the advertiser must believe for running such a message.

Given Data / Assumptions:

• Proposition: unique simultaneous two-programme viewing.
• Medium: advertisement to the market.

Concept / Approach:
Two generic premises underlie advertising: (a) ads can influence consumer choice, and (b) influenced consumers can increase sales. A separate notion that current sales are falling may motivate an ad, but it is not logically required to justify advertising (firms advertise even amid rising sales).

Step-by-Step Solution:
I: The ad assumes a causal link from communication to sales uplift; otherwise the spend is wasteful. Implicit.II: Influence on at least a segment of viewers is necessary; without any influence, sales would not move. Implicit.III: “Downward trend” could be a reason to advertise but is not required; firms also advertise to grow share from a stable base. Not implicit.

Verification / Alternative check:
Advertising fundamentals (awareness → consideration → purchase) support I and II regardless of prior trend.

Why Other Options Are Wrong:
Including III over-specifies motives; “None/Only II” understate the sales intent.

Common Pitfalls:
Assuming advertising only happens when sales are falling.

Final Answer:
I and II are implicit.