Which Statement Best Describes Antagonistic Pleiotropy

Which statement best describes antagonistic pleiotropy?

A) Certain diseases have low frequencies in young people, but the frequencies increase as people age.
B) There are many genes that work together to control aging and thus many opportunities for mutations.
C) Some diseases have low frequencies in geographic populations with high frequencies of certain mutations.
D) Mutations contributing to aging can increase in frequency if those same mutations promote fitness earlier in life.