A piece of copy paper has a thickness of approximately 4 × 10-3 in, and a human hair has a thickness of approximately 1 × 10-3 in. Which of the following is true?
A. A piece of copy paper is approximately forty times thicker than a human hair.
B. A piece of copy paper is approximately four times thicker than a human hair.
C. A human hair is approximately forty times thicker than a piece of copy paper.
D. A human hair is approximately four times thicker than a piece of copy paper.