The sensitivity of a rigid module is A. zero B. between zero and one C. 1 D. infinity

The correct answer is A. zero.

A rigid module is a module that does not change its shape or size when it is subjected to a force. This means that the sensitivity of a rigid module is zero, because there is no change in the output of the module when the input is changed.

Option B is incorrect because the sensitivity of a rigid module is not between zero and one. Option C is incorrect because the sensitivity of a rigid module is not equal to one. Option D is incorrect because the sensitivity of a rigid module is not infinity.