dentify the segment in the sentence, which contains the grammatical error.
Scientists have found that life was creeping and crawling about the Earth 1.5 billion years early than previously thought.

Options

A. previously thought
B. 1.5 billion years early than
C. Scientists have found
D. about the Earth

Answer

B

Explanation

Earlier simply means before some other referenced time. The given question states that life was crawling before the referenced time(1.5 billion years ago) about the earth. Hence, .1.5 billion years earlier than will be answer.