Place the stages of the formation of the Moon in order from the beginning to end. A. The debris collides to form single object.
B. A Mars-sized object collides with Earth.
C. Debris collects in a ring around Earth.
D. Earth undergoes differentiation.
E. The surface of the Moon is smoothed out under its own gravity.

The order are D-B-C-A-E

Explanation:

According to research of the Giant-impact hypothesis, Moon was formed by a giant Theia impact also called the Big Splash about 4.5 billion years ago and this started from the ejection resultant  when a proto-Earth and a planetesima object of about the size of mars collided.

The formation of the moon are in this order below

---Earth undergoes differentiation--D

- A Mars-sized object collides with earth--B

- Debris collects in a ring around earth- C

- The debris collides to form single object--A

- The surface of the moon is smoothed out under its own gravityE