Female deer have no need for antlers. Male deer are older than female deer. Antler growth is controlled by genes. Antler growth depends on behavior.
I gave my students this multiple choice question: In whitetail deer, females seldom grow antlers. Which best explains why male whitetail deer grow antlers but females seldom grow antlers?

Only one answer is correct among these 4 choices:
- Female deer have no need for antlers.
- Male deer are older than female deer.
- Antler growth is controlled by genes.
- Antler growth depends on behavior.

Could you tell me which one is correct?

Antler growth is controlled by genes.