In one study, male U.S. military veterans were asked about their past behaviors, and those with higher testosterone levels more often reported having assaulted others. This is evidence for testosterone's association with

A) erratic and aggressive tendencies.
B) having very many sexual partners.
C) depression.
D) delusions.

Testosterone has been linked to aggressive behaviors in numerous studies. The study mentioned, where veterans with higher testosterone levels reported more instances of assaulting others, supports the association between testosterone and aggressive tendencies, rather than with having many sexual partners, depression, or delusions.