TOEFL Listening: ETS-TOEFL听力机经 - NG1DFG8BAIB3V0X4P$

What does the professor hypothesize on the basis of the study's findings? A. That other species of spiders might have defense mechanisms similar to those used by golden orb weavers B. That golden orb weavers have more than two defense strategies against ants C. That the chemical produced by golden orb weavers may be produced by other animals D. That the chemical produced by golden orb weavers could be produced synthetically