Answer: The correct option is C: Through contact hypothesis.
Step-by-step explanation:
Contact hypothesis refers to the idea that a good relationship between members of different groups can lead to a more positive intergroup attitude. If members of different groups help each other to solve a problem, they can do it more easily. The problem surges when the members of certain group want to gain power, it can be political, economic, or social; in this case, they can't share ideas or strategies with other groups if they want to achieve their objectives.