Source: Official Guide for the GMAT 13th Ed. Sentence Correction; #77 Official Guide for the GMAT 2015 14th Ed. Sentence Correction; #77

4

A 1972 agreement between Canada and the

A 1972 agreement between Canada and the United States reduced the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.

2 Explanations

4

ARUN KARTHIK

Good verb question

Aug 10, 2013 • Comment

Ankish Kumar

This is a very tricky sequence of tense question and we need to focus on meaning then only we can conclude correct tense.

Point to be noted:
Discharge or dumping was reduced not totally disavowed. It is still permitted, but in diminished proportions.

had is absolutely wrong, because discharge though diminished still continues.

A and B are out.

Lets move ahead and see how C, D and E comes out to be.

reduced vs reduces split

1972..agreement... we need a past verb form. reduced is correct, reduces is incorrect.

C and E goes away.

D is correct. "reduced the amount of phosphates that municipalities are allowed to dump" are is correct as municipalities are still allowed to dump/discharge, though proportion is diminished.

Nov 8, 2014 • Reply

3

Gravatar Mike McGarry, Magoosh Tutor

May 23, 2013 • Comment

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Section 9.6 Sentence Correction

Section 9.6 Sentence Correction

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