A speck of dust is 1.2 x 10-6 m wide. Which of the following

Last updated: 7/13/2022

A speck of dust is 1.2 x 10-6 m wide. Which of the following is the best way to rewrite this quantity, using more appropriate units ? OA. 1.2 x 10-6 m OB. 1.2 x 103 mm OC. 1.2 x 10-4 cm OD. 1.2 x 10 ⁹ km