PT 15 S1 Q6

Until the 1980s, most scientists believed that non-catastrophic geological ... ...

The passage supports which one of the following claims about the volcanic-eruption theory?
(A) It does not rely on assumptions concerning the temperature of molten rock at the lowest part of the Earth's mantle.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: Science & Technology Mix 2