People are most likely to notice the impact of environmental influences on behavior when confronted by A. identical twins. B. gender schemas. C. cultural diversity. D. human temperaments.

The correct answer is - option C.

Explanation:

Cultural diversity is the quality of the diversity or differences of the culture or society. It is important due to the various cultural and society or racial groups. It is learned by the one another. When it is confronted by environmental influences on behavior.

Thus, the correct answer is - option C.