Ryan has never been very competitive, and he prefers to go on leisurely backpacking trips. which of the following factors is influencing his activity selection?
a. cost
b. personality
c. environment
d. equipment

I believe the answer is: B. personality

In this context, personality refers to The pattern of thinking and emotion that had by all individuals.

The combination fo these patterns together formed a general perception and behaviour for a person. This might also influence the things that the person like or don't like.

answer; rational if melanie values sleep more highly than the benefits she expects to receive from attending the class;

answer; under developed;