The Most Active Galactic Nuclei Are Usually Found at Large

question 53

Multiple Choice

The most active galactic nuclei are usually found at large distances from us;relatively few nearby galaxies have active galactic nuclei.What does this imply?

• A)Supermassive black holes existed only when the universe was young and no longer exist today.
• B)Active galactic nuclei tend to become less active as they age.
• C)Active galactic nuclei can form only at large distances from the Milky Way.
• D)The jets seen in many active galactic nuclei must cause them to move far away from us.

---

Definitions:

Music Store Business

A commercial establishment that sells musical instruments, sheet music, and/or recorded music.

Gross Method

An accounting method for recording purchases at the invoice's full amount without deducting any cash discounts.

Gross Profit

The difference between sales revenue and the cost of goods sold, before deducting overheads, payroll, taxation, and interest.

Periodic Inventory System

An inventory accounting system where updates to inventory levels are made at specific intervals, rather than continuously.