A Starburst Galaxy Appears to Be a Galaxy in Which

Multiple Choice

A starburst galaxy appears to be a galaxy in which

A) essentially all of the star formation took place in a single,billion-year-long burst early in the life of the galaxy.
B) a central,supermassive black hole is throwing jets of gas and stars out from the nucleus into intergalactic space.
C) most of the energy from the galaxy is being produced by supernovae.
D) a collision with another galaxy has produced a burst of star formation.