In One Study, White Participants Had to Decide as Quickly

In one study, white participants had to decide as quickly as possible whether an object depicted in a photograph was a handgun or a hand tool. Each photograph was immediately preceded by a picture of either a black face or a white face. Results showed that participants were faster to identify the

A) handgun when it was preceded by a black face.
B) handgun when it was preceded by a white face.
C) hand tool when it was preceded by a white face.
D) Both a and c are correct.