Seasonal affective disorder, SAD, is a disorder in which a person experiences depression during the winter and an improvement of mood in the spring

Which of the following best represents the research on gay and lesbian couples?

a. Gay and lesbian adults often seek out romantic partners who are opposite from them in many ways. b. No differences have been identified between gay and lesbian couples. c. Gay and lesbian couples have different sources of conflict in their relationship than do heterosexual couples. d. Gay and lesbian couples are similar to heterosexual couples in most ways.

Considering the concept of "erotic plasticity," research shows that

A) men show greater variation in sexual behavior over time. B) women seem less responsive to cultural factors. C) women show greater erotic plasticity than men do. D) men show greater erotic plasticity than women do.