Someone who has an interest in your business and your product or service can be defined as a:

(1 point)
A. rival.
B. prospect.
C. friend.
D. foe.

B. prospect.

To find the answer to this question, let's break down the options and consider their meanings.

A. Rival: A rival refers to a competitor in the same industry or market who offers a similar product or service. However, the question mentions "interest" in your business and product, suggesting a positive inclination rather than a competitive one. Hence, A is likely not the correct answer.

B. Prospect: A prospect is someone who shows interest or potential as a customer. They may have expressed curiosity or a desire to learn more about your business. This option aligns well with the question's context and is a plausible answer.

C. Friend: While friends can certainly be interested in your business, the term "friend" does not explicitly capture the business context mentioned. Therefore, C is less likely to be the correct answer.

D. Foe: A foe usually denotes an enemy or someone who opposes your business or has negative intentions. Similarly to option A, this does not align with the positive interest indicated in the question.

Based on the explanations above, the most suitable answer is B. Prospect.