Multiple Choice
When viewing the planets,Mars appears to move backwards,or retrograde,because ________.
A) it is rotating around the sun slower than the earth's rotation
B) it is rotating around the sun faster than the earth's rotation
C) it is rotating at approximately the same speed but its orbit is more elliptical than the earth's rotation
D) it is rotating at approximately the same speed but its orbit is more circular than earth's orbit
Correct Answer:

Verified
Correct Answer:
Verified
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