Contrary to earlier assurances, it is likely that
increased water pollution as a result of dumping iron off the coast of Antarctica would hasten global warming by poisoning phytoplankton that absorb large quantities of carbon dioxide.
(A) increased water pollution as a result of dumping
(B) increasing pollution in the water resulting from the dumping of
(C) increased water pollution resulting from the dumping of
(D) pollution in the water that increase from dumping
(E) water pollution that increased from dumping
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Meaning is important to solve the question. Lets use POE to arrive at a single answer.
A - Sentence implies that water pollution resulted from dumping .... - Lets keep it.
B - Increasing water pollution - it means that an action is still in progress. Moreover, pollution in the water seems redundant. B is out.
C - resulting from the dumping of - seems redundant. Compared to A it contains a similar error.
D - Pollution in the water seems redundant compared to other choices. Moreover, that refers to water not pollution . D is out.
E - subject of the sentence is ''water pollution ... would hasten '' logical meaning.
Between A and E , E gives more precise meaning than A does.
E is our winner.