Labrador Retrievers Are Black,brown,or Yellow

Labrador retrievers are black,brown,or yellow.In a cross of a black female with a brown male,results can be all black puppies,1/2 black to 1/2 brown puppies,or 3/4 black to 1/4 yellow puppies.These results indicate which of the following about the inheritance pattern of fur color in Labrador retrievers?

A) Brown is dominant to black.
B) Black is dominant to brown and to yellow.
C) Yellow is dominant to black.
D) Epistasis is involved.