Which of the following statements is not a hypothesis?

a. Aggressive behaviors in female rats will be increased bytestosterone administration, compared to a control group.

b. Anxiety disorders are caused by a combination of genetic andenvironmental influences.

c. College students with higher conscientiousness will achievehigher overall GPAs than those with lower conscientiousness.

d. Rats with damage to their cerebellum will display deficits inmotor coordination, using the rotarod test.