The distinguishing feature of a starburst galaxy is ________.
A) a rate of star formation that may be 100 or more times greater than that in the Milky Way
B) the presence of an unusually large number of binary star systems containing X-ray bursters
C) a very large luminosity compared to the total luminosity of the Milky Way
D) strong radio emission from "lobes" of material well outside the visible boundaries of the galaxy
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