Martha Has a Widow's Peak Dominant Trait) and Attached Earlobes

Multiple Choice

Martha has a widow's peak dominant trait) and attached earlobes recessive trait) . Martha's dad had a straight hairline and unattached earlobes. If Martha marries a man that is heterozygous for both traits, what is the probability that they will have a child with a widow's peak and attached earlobes?

A) 1/16
B) 3/8
C) 1/4
D) 1/2
E) 3/4