All of the following are ways that groups gain power except:

a: by having power over there members
b: by competing with other groups
c: through contact hypothesis
d: through peer pressure

The correct option is C: Through contact hypothesis.

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.

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