We interpret the fact that we saw more AGNs in the past than we do today to indicate that
A) there were fewer galaxy-galaxy interactions in the past.
B) there were more galaxy-galaxy interactions in the past.
C) supermassive black holes were larger in the past.
D) today's AGNs are primarily hidden by large amounts of cold gas and dust.

Question

Quizplus · Accepted Answer

The presence of more AGNs in the past suggest that there were more galaxy-galaxy interactions, which could lead to the formation of supermassive black holes that power AGNs.

We Interpret the Fact That We Saw More AGNs in the Past