* Depression is
an occasional sad mood
a rare illness in teens
O a serious condition that may require medical help
an untreatable illness

Making sure the equipment is cleaned daily and insuring proper hygiene is kept up with the working staff.

(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!