I think it is C, since it sounds the most reasonable.
Answer:
Community Malls
Explanation:
It's the only answer thats a place with official jobs. A normal farm would be there too, but a backyard farm is someones hobby and not a paying occupation, so OSHA isn't in charge of that.
Answer: white blood cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders
hope this helps