Question:

As navigators, calendar makers, and other .............. of the night sky accumulated evidence to the contrary, ancient astronomers were forced to .............. that certain bodies might move in circles about points, which in turn moved in circles about the earth.

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When both words are missing, check subject logic first, then find the verb that matches the described attitude or reaction.
Updated On: Aug 11, 2025
  • scrutinizers; believe
  • observers; agree
  • scrutinizers; suggest
  • observers; concede
  • students; conclude
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The Correct Option is D

Solution and Explanation

"Observers" fits for people studying the sky. "Concede" fits because they had to reluctantly accept evidence against established belief.
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