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Question

Hi, according to me in the attached problem because of is better than since. 
Further since is generally used for the time periods, eg. since 18 minutes..etc.

I think i am confused here between the usage of becuase of (should be followed by noun) and since..

vinay.kaipra · Answer

"within reach of" is the proper idiom.

Option 1 - incorrect usage of idiom "reach from".
Option 2 - parallelism not proper by the last phrase "volcanic activity that thrust ...."
Option 3 - parallelism not proper by the last phrase "volcanic activity that had thrust ...."
Option 4 - parallelism not proper by the last phrase "volcanic activity that thrust ...."
Option 5 - parallelism is proper in this option. Correct one.

gmatcracker2010 · Answer

Thanks for the reply. But i could not understand in terms of the //sm. Could you please reply based on the usage of because of and since?

seekmba · Answer

E for me.

We need “within reach of”

B ) Prospecting for gold…….was a relatively easy task, because of erosion, prehistoric glacier movement, and volcanic activity that thrust……. and putting gold within reach of – If we read the sentence after comma it sounds very awkward. “putting gold” is incorrect

C ) Prospecting for gold…….was a relatively easy task, owing to erosion, prehistoric glacier movement, and volcanic activity that had thrust ……. and putting gold within reach of – If we read the sentence after comma it sounds very awkward. No need of “had thrust”. also, “putting gold” is incorrect

D ) Prospecting for gold…….was a relatively easy task, since erosion, prehistoric glacier movement, and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity put gold within reach of – correct

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