TOEFL Listening: ETS-TOEFL听力机经 - 3YY88EZ2W301INBRP$

What point does the professor make about Orion sword? A. it points toward a nebula in the constellation Taurus. B. it contains a nebula that looks like a star to the naked eye. C. it contain stars whose light is a reflection of other nearby stars. D. it contains two stars that are remnants of a supernova.