GRE Text Completion Question 816
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Source: Red
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.
| Blank(i) | Blank(ii) |
|---|---|
| A indecisiveness | D mandated |
| B radicalism | E hastened |
| C conservatism | F hindered |