Answer the following question: Fact 1: Some parasites kill their host, but most do not. Fact 2: All parasites are harmful to their host, but some are beneficial to humans. Given the two facts above, some what are beneficial to humans?

Possible answers:
A). fungi.
B). parasites.
C). roots.
D). humans suffering.
E). natural disasters.
F). honeybees.
G). poisons.
H). orchids.
Answer:
B).