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

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì