One of the Consequences of the Collision of Two Galaxies

Multiple Choice

One of the consequences of the collision of two galaxies appears to be

A) the disappearance of one of the galaxies into the central supermassive black hole of the other.
B) almost nothing because stars are widely separated in each galaxy and the probability of star-to-star collisions is very small.
C) a burst of vigorous star birth.
D) a very large explosion similar to,but much larger than,a supernova.