Which of the Following Is the Best Example of the Expressivity

Multiple Choice

Which of the following is the best example of the expressivity of genes?

A) Michelle and Michael are twins and they exhibit similar behaviors.
B) Manuel's tendency to be emotional is determined by recessive genes he received from both his parents.
C) Clara's blood type is AB because her mother was heterozygous for type B and her father was heterozygous for type A.
D) Linda received a dominant gene for freckles from her father,but Linda's freckles are smaller,lighter,and more widely scattered than those of her father.