Which of the Following Is the Most Likely Explanation of the Evidence

Which of the following is the most likely explanation of the evidence presented by MacNell and colleagues (2015) study on gender bias in teaching evaluations?

A) Gender bias in teaching evaluations is driven by explicit, conscious sexism.
B) Instructor evaluations are biased by gender stereotypes outside of students' awareness.
C) Bias in evaluations favoring men is mainly driven by the attitudes of male students.
D) Individualistic, Western culture increases gender bias in teaching evaluations favoring men.