In category hierarchies, the most useful and predictive information is provided by:

First-year college students may be more susceptible than seniors to informational social influence because

a. they want to be liked by a group. b. there is a charismatic leader in the group. c. they have no allies in their group. d. the situations they encounter are ambiguous.

According to the introduction of the chapter on women and physical health,

a. most of women's physical health problems can be traced to psychological difficulties. b. health psychology is an important topic in the medical professions, but—surprisingly—not within psychology. c. health psychology examines the causes of illness, as well as illness prevention and health improvement. d. research has found only small gender differences in physical health.