The volume of Earth is approximately 1 × 1012 cu km, while the volume of Earth's moon is approximately 2 × 1010 cu km. Which of the following is true?
A. The volume of Earth's moon is approximately five times the volume of Earth.
B. The volume of Earth's moon is approximately fifty times the volume of Earth.
C. The volume of Earth is approximately fifty times the volume of Earth's moon.
D. The volume of Earth is approximately five times the volume of Earth's moon.