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.

As navigators, calendar makers, and other _________ of the night sky a

1.	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.
A.	scrutinizers, believe
B.	observers, agree
C.	scrutinizers, suggest
D.	observers, concede
Answer» E.