The diameter of a strand of rope is 1.2 × 10^ -3 inch. The diameter of a strand of floss is 2.0 × 10^ -4 inch. How much longer is the diameter of the strand of rope than the diameter of the strand of floss? A. 2.0 × 10^ -7 inch B. 1.0 × 10^ -7 inch C. 2.0 × 10^ -3 inch D. 1.0 × 10^ -3 inch