Someone who demonstrates a strong desire to influence others, and control people and situations, is showing a
a. need for achievement
b. need for power
c. need for affiliation
d. need for transcendence

The answer is: b. need for power

Explanation:

Affiliation is the act of joining, a group, for example. The fact of influencing others and control situations has nothing to do with this noun. Transcendence means just going beyond ordinary, again, nothing to do with influencing and controlling, and well, achievement is a synonym for accomplishment, of doing hard work for instance. Whereas power is the capacity or ability to influence over other people or situation, for instance, the president of the United States has the power of a whole nation, and he influences over the decisions for situations and people who live in the country.