How Is the Energy That Powers Radio Galaxies, Quasars, and Other

How is the energy that powers radio galaxies, quasars, and other active galactic nuclei produced?

A) by nuclear fusion near a central black hole
B) by magnetic fields that trap and accelerate charged particles, which then radiate large amounts of energy
C) by matter that has been converted to pure energy by interacting with the jets shot out by a central black hole
D) by gravity, which converts the potential energy of matter falling toward a central black hole into kinetic energy, which is then converted to thermal energy by collisions among the particles of matter
E) by matter-antimatter annihilation near a central black hole