In Humans,having Dimples in the Cheeks Is a Dominant Trait

Multiple Choice

In humans,having dimples in the cheeks is a dominant trait.If a child has dimples but only one of her parents does,what are the genotypes of her parents? (D = dimples;d = no dimples)

A) One parent dd,other parent DD
B) One parent dd,other parent Dd
C) One parent Dd,other parent DD
D) One parent must be DD,the other parent could be either dd or Dd
E) One parent must be dd,the other parent could be either Dd or DD