In M82, Observations Indicate That There Are Several Bright Sources

In M82, observations indicate that there are several bright sources close to the center of the galaxy. These might be

A) supernovae.
B) accretion disks of supermassive black holes, millions of times as massive as our sun.
C) accretion disks of intermediate black holes, hundreds of times as massive as our sun.
D) accretion disks of stellar mass black holes.
E) red giants in the process of forming planetary nebulae.