Final answer:
A customer's likelihood to agree to a proposition increases when similar customers have accepted it or when they have agreed to similar propositions previously, aligning with the foot-in-the-door sales technique.
Step-by-step explanation:
A customer's propensity to accept a proposition increases when the proposition was accepted by similar customers (A) and when similar propositions were accepted by the customer (B). This concept is closely related to the foot-in-the-door technique often used in sales. The technique involves starting with a small request, which is more likely to be accepted, and then following up with a larger request. For example, a store owner selling a smartphone may first convince a customer to buy the best data plan and, on acceptance, suggest the bigger purchase of a three-year extended warranty. This incremental approach to selling capitalizes on the customer's tendency to agree to larger requests after having agreed to smaller ones, thus increasing their compliance.
Answer: B) similar propositions were accepted by the customer