Which of the Following Statements Is True About the Relationship

Which of the following statements is true about the relationship between testosterone and aggression?

A) The relationship between testosterone levels and aggression is indirect.
B) Aggression increases as people age because testosterone levels increase as people grow old.
C) Testosterone levels are lower among prisoners convicted of planned violent crimes compared with those convicted of nonviolent crimes.
D) Men with low testosterone are less likely to react aggressively when provoked.