Professor stewart wrote a very positive letter of recommendation for a student, despite his doubts about her competence. after writing the letter, he began to develop a more favorable attitude about the student's abilities. which theory best explains why?
a) the social exchange theory
b) the two-factor theory
c) the cognitive dissonance theory
d) the equity theory

C) the cognitive dissonance theory.

Explanation:

The cognitive dissonance theory (1957) proposed by Leon Festinger applies in this case because is about a situation involving conflicting attitudes (like the professor beliefs about the student) producing a feeling of mental discomfort that leads to alteration of these attitudes in order to restore balance (the professor starting to develop a more favorable behavior).

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