What is the best way to take two initially hostile groups and create in them feelings of in-group belongingness?

Question

Quizplus · Accepted Answer

Bringing two initially hostile groups together and having them work towards a common goal helps to create a sense of shared identity and purpose. This can help to break down barriers and foster feelings of in-group belongingness. Noncompetitive activities (choice A) may not provide enough of a sense of shared identity, while competitive activities (choice B) may actually reinforce inter-group hostility. Increasing solidarity within each group (choice C) may help those groups feel more cohesive, but it may not necessarily lead to positive inter-group interactions.

What Is the Best Way to Take Two Initially Hostile