Whenever the Dominant Allele of Either (Or Both)gene a or Gene

Multiple Choice

Whenever the dominant allele of either (or both) gene A or gene B is present,red color is produced.A cross of AaBb × AaBb can be expected to yield how many red offspring out of 16? Assume the genes are not linked.

A) 1
B) 4
C) 12
D) 15
E) 16