1) In which way did Copernicus' model differ with Ptolemy's?
D. The earth revolves around the sun.
2)In the Copernican model, retrograde motion:
C. occurs when one planet passes another.
3) Venus has a larger angle at maximum elongation than does Mercury. In the Copernican model, this fact is used to infer:
B. that Venus is farther from the sun than Mercury.