Reading Comprehension (RC) | Re: Earths surface consists of rigid plates that are constantly shifting

Choice D doesn't just refer to a group ofvolcanoes —it actually refers to a group OF GROUPS ofvolcanoes .

You've already realized that "achain of volcanoes" is agroup of them (formed over one hot spot, as one of Earth's plates moves over that spot).

Choice D, however, talks about "manyOTHER volcanicchains "—in other words, other clusters or groups of the same type.
That's directly contradicted by the passage text, which says that an established mantle plume will create
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