Which sentence is written in the active voice?

A.

A perfectly preserved woolly mammoth was found frozen in ice by scientists.

B.

Scientists found a perfectly preserved woolly mammoth frozen in ice.

The answer is B. Scientists found a perfectly preserved woolly mammoth frozen in ice.

Active voice is a sentence form wherein the action, represented by the verb, is done by the subject. Therefore, the sentence that is written in the active voice is, option B. Scientists found a perfectly preserved woolly mammoth frozen in ice. The subject in the sentence is the word "scientists" and the action word "found" is done by the subject.