Kant argues that we should never use people as a means: unless we are certain that it benefits the majority. unless we are certain that it is to their own long-term benefit. unless we are respecting their rational autonomy at the same time. for any purpose whatsoever.

The choices are the following:

A. unless we are certain that it benefits the majority
B. unless we are certain that it is to their own long-term benefit
C. unless we are respecting their rational autonomy at the same time.for any purpose whatsoever

The correct answer is letter B. Kant argues that we should never use people as a means unless we are certain that it is to their own long-term benefit