Why are active galaxies and quasars so much brighter then the milky way?

Question

Pick one.

They contain an accretion disk surrounding a central, supermassive black hole, which emits large amounts of electromagnetic radiation.

Active galaxies have extremely high magnetic fields, which generate massive amounts of electromagnetic radiation.

The cores of these galaxies contain many massive stars, which create multiple supernovae.

They contain highly radioactive cores that are generating light via nuclear fission

Answer 1

They contain an accretion disk surrounding a central, supermassive black hole, which emits large amounts of electromagnetic radiation.  

Answer 2

they give off more radio waves so the static means something. nothing to do with this. they are brighter because the gamma rays and X-rays are being left off them. the more of the gamma rays and x rays, the brighter they are.

Answer 3

The first one is the one that seems most plausible to me. Must be a whole buncha stuff in that accretion disk. Maybe it's like a star core all spread out over a whole lot of square light years of disk surface.