DisciplinedPrep wrote:
Until recently, parents whose teenaged child had signed a purchase contract without their written agreement were not liable for the child's debt.
A. without their written agreement were not
B. that they do not agree in writing have not been
C. and they had not agreed in writing had not been
D. without them agreeing in writing had not been
E. without their written agreement are not
Two points..
(1)
Without their written agreement : It is a prepositional phrase and requires to be next to what it modifies that is
purchase contractSo eliminate B and C.
(2)
Tense : We are talking of something that is over, and we know that through the use of
until recently.
A uses this correctly.
A
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html
4) Base while finding % increase and % decrease : https://gmatclub.com/forum/percentage-increase-decrease-what-should-be-the-denominator-287528.html
GMAT Expert
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73% (01:19) correct 
