Mercury has an unusual motion called "resonance rotation" where every ____ times it orbits the sun, it rotates on its axis ____ times, taking 176 earth days to complete one noon to noon cycle.

Mercury has an unusual motion called "resonance rotation" where every ____ times it orbits the sun, it rotates on its axis ____ times, taking 176 earth days to complete one noon to noon cycle.



A. 1; 4
B. 3; 2
C. 1; 1
D. 2; 3




Answer: D


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