Derek is feeling sad. According to the facial feedback hypothesis, what could Derek do that would likely make him feel better?

At first, babies are sensitive to virtually all speech sounds, but around 6 months, they

A) gain musical rhythm perception. B) begin to perceive grammatical structure in sentences. C) narrow their focus, limiting distinctions to the language they hear and will soon learn. D) show a preference for their native tongue.

Different studies of aggression have yielded conflicting results regarding the issue of whether men or women are more aggressive. Which of the following statements best clarifies this issue?

A) Men are more likely to be instrumentally aggressive, but women are more likely to be emotionally aggressive. B) Men used to be much more aggressive than women, but in current society, women are just as aggressive as men. C) Women are more aggressive than men, but the effects are almost always milder. D) Men commit more acts of direct aggression than women, but women commit more acts of indirect aggression than men.