How do you think the high rates of HIV transmission in humans might be related to the length of time it takes for the virus to develop into AIDS?

Yes because you can have it for years before it develops into AIDS and between those years you can have intercourse and spread it without knowing. If it developed into AIDS sooner people would be aware they have it sooner and would be more likely to not have intercourse or use protection.

(a) is not correct because one does not get increased cholesterol  from lifting weights.(b) is not correct because lifting weights cannot reduce the risk of a hereditary disease.(c) is not correct because back pain isn't a benefit! and plus, if he lifts weights properly, he should not have back pain.(d) is the correct answer because his ligaments will gain mass, making it easier for him to carry heavier weights and he will also be stronger!