In January 2015, geoscientists proved the previously discarded theory that some of the ocean's underwater volcanoes did not erupt from hot spots in the Earth's mantle but instead were formed from cracks or fissures in the oceanic crust.
Split - Not verb but verb; eliminate B
A. that some of the ocean's underwater volcanoes did not erupt from hot spots in the Earth's mantle but instead were
Correct parallelism and use of that modifier
C. that some of the ocean's underwater volcanoes had not erupted from hot spots in the Earth's mantle but instead were
HAD NOT - Past perfect not required
D. that some of the ocean's underwater volcanoes from hot spots did not erupt in the Earth's mantle but instead were
Change in meaning
E. in which some of the ocean's underwater volcanoes did not erupt from hot spots in the Earth's mantle but instead were
In which is incorrect