An Incompletely Dominant Gene Controls the Color of Chickens So

An incompletely dominant gene controls the color of chickens so that BB produces black, Bb produces a slate-gray color called blue, and bb produces splashed white.A second gene controls comb shape, with the dominant gene R producing a rose comb and r producing a single comb.If a pure-breeding, black chicken with a rose comb is mated to a splashed-white chicken with a single comb in the F₂ generation, what fraction of the offspring will be black with rose comb?

A) 9/16
B) 3/8
C) 3/16
D) 1/8
E) 1/16