In Most Cases It Is Impossible to Observe the Host

In most cases it is impossible to observe the host galaxies of quasars because

A) quasars outshine the host galaxies by a few orders of magnitude.
B) the supermassive black holes have "eaten" all the stars in those galaxies.
C) the host galaxies of quasars have too much dark matter.
D) the host galaxies of quasars have too much obscuring dust.
E) the galaxies hosting quasars are much smaller than our own Milky Way.