Answer the following question given this paragraph: 

Haumea is the third-brightest Kuiper belt object. Haumea has two moons. Haumea's odd oval shape is probably caused by its extremely rapid rotation. It rotates in just less than 4 hours! Like other Kuiper belt objects, Haumea is covered by ice. Its density is similar to Earth’s Moon, at 2.6 – 3.3 g/cm 3 . This means that most of Haumea is rocky.


Q: Haumea, which is the third brightest kuiper belt object has an odd oval shape which is probably caused by what?

 Choices:

- unusually rapid rotation

- particularly rapid rotation

- Slow rotation

- extremely rapid rotation

A:
extremely rapid rotation
