Which of the Following Experimental Manipulations Has Been Shown to Decrease

Multiple Choice

Which of the following experimental manipulations has been shown to decrease conflict among groups?

A) Randomly dividing groups into two subgroups and asking each group to come up with a group name.
B) Asking members of two groups to merge completely.
C) Asking members of two groups to perform distinct roles and tasks that contribute to the overall good.
D) Asking members of two groups to think of themselves as individuals, rather than group members.