In Research Conducted by Neir and His Colleagues, White Students

In research conducted by Neir and his colleagues, white students asked black students to complete a survey for them at a football game. Which of the following was found?

A) The black students were more likely to comply when the white students smiled at them.
B) The black students were more likely to comply when the white students wore a hat from the same university that the black students wore.
C) The black students were more likely to comply when the white students wore a hat from a different university than the black students wore.
D) The black students were unlikely to comply due to racial prejudice.