Which Observation Proves the Best Evidence That a Parasite Could

Multiple Choice

Which observation proves the best evidence that a parasite could be causing a behavioral change in the host?

A) The protein profile of the parasitized animal is different from the unparasitized animal.
B) Many proteins increase or decrease in the brain of a parasitized animal.
C) The parasitized animal behaves in a manner never observed in unparasitized animals.
D) The parasitized animal dies from the parasite.