Research into the Mere Exposure Phenomenon Finds That Simple Exposure

Research into the mere exposure phenomenon finds that simple exposure between two groups of people is not enough to reduce prejudice,but rather

A) groups exposed to each other will be able to reduce prejudice as long as the reasons for their feelings are not actively discussed, thus preventing arguments that can lead to violence.
B) groups will only reduce prejudice if they interact in a setting where negativity and prejudice are overtly and covertly discouraged, like in a church or temple.
C) groups being exposed to those about whom they hold prejudice only serves to increase those tensions.
D) groups working together in a cooperative manner help reduce prejudice.