Which of the Following Is the Best Example of Active $\rightarrow$

Which of the following is the best example of active genotype $\rightarrow$ environment effects?

A) Since Jacob is good at math, his parents encourage further learning by playing math games with him each night.
B) Because everyone in the Martin family burns easily, they rarely go to the beach and have moved to a colder weather state.
C) Maria has a green thumb and can grow anything in her garden. When her children were small, they played in the garden next to her. As they grew up, each child decided to go into agricultural fields.
D) Millie was a very round baby and was big for her age. Everyone in her family made comments about her large size and nicknamed her 'Big Millie'.