Answer:
Step-by-step explanation:
According to current theories of galactic evolution, quasars occur (a) early in the evolutionary sequence.
Quasars, also known as quasi-stellar radio sources, are highly energetic and distant objects that emit tremendous amounts of electromagnetic radiation. They were first discovered as radio sources but are now known to emit radiation across the entire electromagnetic spectrum.
Quasars are believed to be powered by supermassive black holes at the centers of galaxies. According to current theories, quasars occur early in the evolutionary sequence of galaxies when these supermassive black holes are actively accreting matter from their surroundings. This process leads to the release of enormous amounts of energy, making quasars visible from great distances.