Which of These Statements MOST Accurately Characterizes the Abundance of Quasars

question 9

Multiple Choice

Which of these statements MOST accurately characterizes the abundance of quasars over the universe's history?

• A) Quasars were most common very early in the universe's history, about 100 million years after the Big Bang, and their abundance has been declining ever since.
• B) Quasars have been increasing in abundance over time, so that they are most common today.
• C) Quasars peaked in their abundance about 11-12 billion years ago.
• D) Quasars go through cycles in which their abundance increases dramatically then decreases. At the present day, they are at a low point in the cycle.

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Definitions:

External Locus

The belief that one’s life events are primarily controlled by external forces or influences rather than one’s own efforts.

Oxytocin Levels

Concentrations of oxytocin, a hormone involved in social bonding, sexual reproduction, and childbirth, in an individual's body.

Optimistic Outlook

A mindset that tends to view situations and the future in a positive light, expecting favorable outcomes.

Type A Personality

A characteristic where an individual exhibits intense competitiveness, self-driven stress, and an ongoing feeling of haste.