TOEFL Listening: ETS-TOEFL听力机经 - 194D7PPI2334_1BJP$

What is the professor's attitude toward the two theories? A. He is convinced that neither of them can explain why brown dwarfs have stellar disks. B. He hopes both theories will be confirmed by computer simulations. C. He thinks evidence supports the turbulence theory even if he cannot rule out the ejection theory. D. He finds the ejection theory more attractive than the turbulence theory.