Answer: complete equality destroys individuality.
Explanation: The main theme of "Harrison Bergeron" is a) complete equality destroys individuality. The story by Kurt Vonnegut Jr. portrays a dystopian society where everyone is forced to be equal in every way, which results in the suppression of individuality, creativity, and excellence. The story suggests that the pursuit of absolute equality can lead to a loss of freedom and a lack of diversity, ultimately resulting in a society that is dull, oppressive, and stagnant.