Order the following numbers written in scientific notation from greatest to least: 3.9 × 105, 6.1 × 103, 9.3 × 105, 1.6 × 103 A. 9.3 × 105, 3.9 × 105, 6.1 × 103, 1.6 × 103 B. 1.6 × 103, 6.1 × 103, 9.3 × 105, 3.9 × 105, C. 3.9 × 105, 9.3 × 105, 1.6 × 103, 6.1 × 103,