Which of the following is an example of the evocative heredity/environment relationship?
A. When things don't go Ian's way, he loses his temper. So Ian's co-workers go out of their way to help him calm down.
B. Josh is always smiling, but his mother can't understand what he's so happy about.
C. Kerry is crabby when she wakes up, so her husband makes an effort to cheer her up.
D. Nathan is a very argumentative person, so people are always fighting with him.