Many Male Songbirds Are Brightly Colored

Many male songbirds are brightly colored.However,the color of the birds is determined by a balance of

A) natural selection against bright colors by predation and sexual selection in favor of bright colors.
B) mutations that reduce bright colors and gene flow in favor of bright colors.
C) natural selection against bright colors by predation and mutations that introduce bright colors.
D) mutations that reduce bright colors and sexual selection in favor of bright colors.
E) gene flow that reduces bright colors and natural selection in favor of bright colors.