OPT:
a). Joint pain
b). Limber joints
c). Loose joints
d). influenza
e). chickenpox
f). disease
g). Money creation
h). anemia

You are presented with the quiz "What can infection cause?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "infection can cause bodily tissues to swell" and "joints swell painfully". So, what's the best answer to the question?
Answer:
a).