D because of the size and how thick or thinner they are
D. Supercontinent
This is because divergent, convergent, and transform are the three types of plate boundaries.
What? Were you trying to answer another question or am I just not okay?
The answer is Accretion of material by the supermassive black holes located in the galactic cores and this is the cause of intense luminosity of the galaxies that are active like seyferts as well as quasars.Hope this is the answer and would help.