At the given time, Saturn was 9.1 x 10^8 miles from the sun and Earth was 9.3 x 10^7 miles from the sun. By what distance is one planet closer to the sun than the other?
A) 2x 10^1
B) 2x 10^15
C) 8.17x 10^7
D) 8.17x 10^8


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