Critical reasoning — assumptions (implicit): Statement: "But out of A, B, C and D products, you buy B which alone is based on the international technology." — a shopkeeper tells a customer. Assumptions: I. Customers normally accept the recommendation of the shopkeeper. II. Use of international technology is supposed to ensure better quality standards.

Introduction / Context:
Here a shopkeeper recommends product B, citing that it alone uses international technology. Which assumptions underlie this persuasive move? We must separate what is necessary for the recommendation's relevance from what is merely possible about customer behavior.

Given Data / Assumptions:

• Recommendation criterion: international technology.
• Assumption I: Customers normally accept shopkeeper recommendations.
• Assumption II: International technology implies better quality standards.

Concept / Approach:
The recommendation is intended to influence the buyer by highlighting a quality-related attribute. For the argument to have force, the cited attribute must be taken as desirable (II). Whether customers usually accept recommendations (I) is not required; the shopkeeper can still present reasons without presuming compliance.

Step-by-Step Solution:

Verification / Alternative check:
Negate II: If international technology did not connote quality, the argument loses its rationale. Negate I: Even if customers rarely accept advice, giving a quality-based reason is still rational; the statement need not assume compliance.

Why Other Options Are Wrong:

• Only I/Either/Neither/Both: These either ignore the quality link (II) or incorrectly require presumed compliance (I).

Common Pitfalls:
Confusing persuasive intent with guaranteed acceptance. Arguments require the relevance of the cited reason, not a prediction of audience behavior.

Final Answer:
Only assumption II is implicit