What sets the limit for how quickly a black hole can grow?

a$.$ Electron degeneracy pressure prevents material from accreting on black

holes too rapidly.

b$.$ Neutron degeneracy pressure prevents material from accreting on black

holes too rapidly.

c$.$ Hawking radiation increases if black hole grows too quickly causing it to

shrink instead.

d$.$ If a black hole grows too quickly it will tear itself apart through tidal

forces.

e$.$ Accretion creates a lot of light that pushes away additional material by

photon pressure.