Since a western set of values guides the definition of "normal," psychological research can be considered
a. sexist
b. ageist
c. ethnocentric
d. racist

The correct answer is option C. "ethnocentric".

Explanation:

Ethnocentrism is defined as the practices of evaluating people from different cultures with the standards established by an unique culture. After a psychological research of the use of the word "normal", it is considered that is often used with ethnocentric means. This conclusion was made by considering that what is "normal" is applied to an unique culture, established by the dominant culture in the country.

answer; /// the above statement is (true);