What are the answer choices? It could be drug abuse or distracted driving.
Cholesterol (especially LDL*) tend to get into macrophages which migrate into blood vessels. Macrophages with cholesterol cannot get out of the vessels and stay there which causes a lipid mass in arteries. That causes atherosclerosis.
I believe the answer is B
An example of an aerobic exercise:
d)
A and C
Listening to music, going for a run, and writing in a journal