TOEFL Listening: ETS-TOEFL听力机经 - U3OKZ5Q530169604P$

How does a strong odor help Rafflesia? A. The odor is a signal to nearby plants of the opposite sex. B. The odor keeps away large predators that might eat it. C. The odor discourages parasites from growing near it. D. The odor attracts flies that pollinate its flowers.