Which is the best way to rewrite the sentence below?

The ostrich is the fastest animal on Earth with two legs which are very long and it can run as fast as 40 miles per hour and make strides of up to 15 feet.
A
The ostrich is the fastest animal on Earth with two legs, its legs are long so it runs fast and takes long strides.

B
The ostrich has very long legs and is the fastest animal in the world and can run very fast.

C
The ostrich can run up to 40 miles per hour with its long legs. Makes strides of up to 15 feet.

D
The ostrich is the fastest two–legged animal on Earth. It can run up to 40 miles per hour and make strides of up to 15 feet.