In general, what effect does the presence of other people have on the amount of food an individual eats?

a. The presence of others makes people eat less.
b. The presence of others makes people eat more.
c. The presence of others has no effect on the amount people typically eat.
d. The presence of others can make people eat more or less than usual, depending on the situation.

Answer: D

Rationale: The longer a person sits socializing, the more likely he or she is to continue nibbling. However, good manners—at least in some social and cultural settings—is to eat small amounts to avoid seeming rude.