Which of the following statements is CORRECT concerning the concept of gender and dreams?

a. Men and women typically dream about similar things.
b. Men dream more each night than women.
c. Research reports that men and women differ in the things they dream about.
d. Women tend to dream twice as much as men.
e. Men's dreams are more affected by what they eat before bed than are women's.

c. Research reports that men and women differ in the things they dream about.