What have humans collected and grown as food for thousands of years?
Options:
- (A) sunlight
- (B) fungi
- (C) plants
- (D) rocks
- (E) fungus
- (F) salmon
- (G) ferns
- (H) poison OK. Let's think hard:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Humans have collected and grown mushrooms for food for thousands of years. Mushrooms are also fungi. Humans have collected and grown fungi for food for thousands of years.
So, the final answer is (B).