It Is Believed That Ring Galaxies Form

Multiple Choice

It is believed that ring galaxies form

A) when two galaxies collide nearly head on at high speed.
B) when two spiral galaxies collide, but not directly head on.
C) from a large cloud of gas and dust with very little angular momentum.
D) from a large cloud of gas and dust with a very high angular momentum.
E) when more than two galaxies collide at the same time.