Many native american tribes rejected the indian reorganization act because

Some of its requirements forced them to abandon their traditional practices, is the right answer.

Explanation:

The Indian Reorganization Act is also known as the Wheeler-Howard Act. Enacted on 18th June 1934, this act was a  federal law of the United States which dealt with the status of the American Indians. The main goal of this Act was to modify the traditional goal of adaptation of Indians into the society of Americans and to encourage, promote and preserve the tribes and their traditional values and culture.

However, this act was rejected by many native American tribes on the grounds that some of its provisions forced them to evacuate their traditional customs.

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