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The diameter of Earth is 12.7 Mm. Express this diameter in centimeters.
A. 1.27 × 10⁷ cm
B. 1.27 × 10⁸ cm
C. 1.27 × 10⁵ cm
D. 1.27 × 10⁶ cm
E. 1.27 × 10⁹ cm