Final answer:
When the feeding rate of a black hole changes, it can trigger a burst of radiation.
Step-by-step explanation:
When the feeding rate of a black hole changes, the event horizon does not shrink, the accretion disc does not disappear, and the black hole does not undergo precession. However, it can trigger a burst of radiation. As matter falls into a black hole, it forms an accretion disc around it. This accretion disc heats up and radiates energy, including x-rays. The rate at which matter falls into the black hole determines the intensity of the radiation emitted. A change in the feeding rate can lead to an increase or decrease in the amount of radiation produced by the black hole. Therefore, option a) It triggers a burst of radiation, is the correct answer.