Bunuel
In the 1960s, to reduce the discharge of untreated wastes into the Great Lakes, limits were set by the United States and its neighbouring countries on the amount of effluents that could be discharged into these water bodies.
(A) limits were set by the United States and its neighbouring countries on
(B) limits set by the United States and its neighbouring countries for
(C) the United States and its neighbouring countries have set limits on
(D) limits have been set by the United States and its neighbouring countries restricting
(E) the United States and its neighbouring countries set limits on
Official Explanation:
Answer: E
The sentence starts with a modifying phrase—
to reduce the discharge of untreated wastes into the Great Lakes—so whoever is doing this reduction should come after the comma, that is, the
United States. Hence, eliminate A, B, and D.
The present tense
have set in D is not consistent with the non-underlined part of the sentence, which is talking about an event in the past. E gets this right by using the past tense set, and is the correct answer.