Question

what happens when black holes accrete matter too quickly?
they become 3 - dimensional instead of 2 - dimensional.
they are upgraded from supermassive to stellar - mass black holes.
they collapse in on themselves.
they may spit energy into space.

Explanation:

When black holes accrete matter too quickly, they can release a large - amount of energy in the form of radiation and outflows. This is because the in - falling matter heats up and emits energy as it spirals into the black hole. Supermassive black holes are much larger than stellar - mass black holes and accretion doesn't change their mass classification in the way described. Black holes are already 3 - dimensional and don't change dimensionality due to accretion. They also don't collapse in on themselves further just from rapid accretion.

Answer:

They may spit energy into space