Which of these actions is an example of practicing delayed gratification
rather than acting on an impulse?

(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!

You can do planks so harden ur breast. in case there not strong enough to hold their own weight.

You answer would be c.