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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote Although improved efficiency This topic has 1 expert reply and 1 member reply Although improved efficiency Although improved efficiency in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting consumption. A. in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting B. in converting harvested trees into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost C. of converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, which boosts D. of harvested trees being converted into wood products may reduce harvest rates, it will stimulate demand, because it will increase supply and lower prices, thereby boosting E. when harvested trees are converted into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost I am not sure of the official answer as there is ambiguity between A & B. The particular question has been discussed in lot of other forums but everyone is stuck between A & B Can experts explain please. Senior | Next Rank: 100 Posts Joined 04 Jun 2014 Posted: 53 messages Followed by: 2 members Upvotes: 6 Option A is the correct ans. Getting to your confusion B is wrong Two reasons 1.The subject of the sentence is 'improved efficiency'.Now which boost in option B refers to the increasing supply and lower prices.It is ambiguous in this too because it can refer only to prices as well.The correct usage for which would have been with the reference of 'IMPROVED EFFICIENCY' (ask what boosts the consumption) 2.Although is a parallel marker...Although X,Y here X is improved efficiency so'Y' should also have been 'Noun phrase' but here Y='demand' which is a verb so not parallel Also option A is perfect in terms of meaning.Reference of it is clear to be improved efficiency and it maintains proper parallelism as well. Hope it helps!! _________________ If you want to fly,you have to give up the things that weighs you down! PS GMAT/MBA Expert GMAT Instructor Joined 25 May 2010 Posted: 15195 messages Followed by: 1861 members Upvotes: 13060 GMAT Score: 790 dustystormy wrote: Although improved efficiency in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting consumption. A. in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting B. in converting harvested trees into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost C. of converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, which boosts D. of harvested trees being converted into wood products may reduce harvest rates, it will stimulate demand, because it will increase supply and lower prices, thereby boosting E. when harvested trees are converted into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost B and E: Although improved efficiency...may reduce harvest rates, demand will be stimulated. Here, although incorrectly serves to compare an ACTIVE CLAUSE (the clause in blue) to a PASSIVE CLAUSE (the clause in red). The result is a lack of parallelism. Eliminate B. In C, which boosts (which + SINGULAR VERB) lacks a clear singular antecedent. It cannot serve to increasing supply -- the nearest preceding singular noun -- since this noun is part of a compound noun phrase (increasing supply AND lowering prices). Eliminate C. D: improved efficiency of...trees Here, the conveyed meaning is that the TREES have become more efficient. This meaning is nonsensical. Eliminate D. The correct answer is A. Other errors in B: B: Demand will be stimulated because of increasing supply and lowering prices. Here, the conveyed meaning is that increasing supply and lowering prices will cause SOME UNKNOWN ENTITY to stimulate demand. The intended meaning is that IMPROVED EFFICIENCY will stimulate demand. Eliminate B. B: increasing supply and lowering prices, which boost Here, it is not crystal clear whether which boost (which + PLURAL VERB) serves to refer only to lowering prices or to both increasing supply AND lowering prices. Eliminate B. _________________ Mitch Hunt Private Tutor for the GMAT and GRE GMATGuruNY@gmail.com If you find one of my posts helpful, please take a moment to click on the "UPVOTE" icon. Available for tutoring in NYC and long-distance. For more information, please email me at GMATGuruNY@gmail.com. Student Review #1 Student Review #2 Student Review #3 Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! 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