What are two manual labor jobs that were performed in the past that could contribute to the respiratory issues of today?

An example of such jobs would be Mining and being a Pharmacist. Miners would often inhale dirt and other components that would destroy their lungs, while pharmacists would inhale fumes and other matter that's bad for you. The same can go for Construction workers who would inhale a large amount of dust.

Pretty bad i would assume.

Ibelieve it's choice d.