GRE Text Completion Question 816
It was not only the (i) _____ of geologists that (ii) _____ earlier development of the revolutionary idea that the Earth's continents were moving plates; classical physicists, who could not then explain the mechanism, had declared continental movement impossible.
|A indecisiveness||D mandated|
|B radicalism||E hastened|
|C conservatism||F hindered|
Correct Answer: CF