Research on Unrequited Love Shows That

Research on unrequited love shows that:

A) unrequited love is relatively rare because being romantically attracted to someone who is not romantically attracted to us in return is not rewarding.
B) because it causes heartache,feelings of unrequited love fade quickly once it becomes clear the other person is not attracted to us in return.
C) being the object of unrequited love is a particularly flattering experience.
D) feelings of unrequited love are likely to persist because we believe that if we work hard enough we may eventually win the affection of the person we desire.