Why do you think the meatpackers were allowed to operate in such an unsanitary way in the first place?

There were no regulations in the meatpacking industry, they were paid poorly and there were no repercussions in acting as they did. 

Answer a unit dose;

(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!