Why do we believe that starburst galaxies represent a temporary stage in galaxy evolution?
A) We observe starbursts to last only a few years at a time.
B) Such galaxies form stars at such a high rate that they would have consumed all their gas long ago if they had always been forming stars at this high rate.
C) We don't see any nearby starburst galaxies.
D) All starburst galaxies look like normal spiral galaxies, aside from the starbursts.
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