If a Population Is Subject to Frequency-Dependent Selection, Then

If a population is subject to frequency-dependent selection, then

A) two alternative forms of a trait can persist indefinitely in the population.
B) the rarer of two forms of a trait will become somewhat rarer in the next generation.
C) the frequency of an adaptation will become greater over time, depending on the extent to which individuals with that trait out-reproduce individuals with the alternative attribute.
D) neither form of the trait is considered an adaptation but instead these forms are kept in the species to provide flexibility, should the environment change.