genes that code for heart defects. infections that damage the heart muscle. other diseases that cause the heart to wear out. intense exercise that increases the heart rate.
I gave my students this multiple choice question: Doctors have determined that each of these factors could cause heart disease in humans except

Only one answer is correct among these 4 choices:
- genes that code for heart defects.
- infections that damage the heart muscle.
- other diseases that cause the heart to wear out.
- intense exercise that increases the heart rate.

Could you tell me which one is correct?

intense exercise that increases the heart rate.