jzchina 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
in "because of doing", "doing " refers to general action but not to specific action of someone in the sentence. this is key point.
in contrast, "by doing" refers to the subject of the main clause. this means the subject perform action of doing
so, in choice B, "because of increasing and lowering" is wrong because "it", "efficiency" dose not perform action of increasing and lowering
similar example
because of learning gmat incorrect way, I fail on the test.
this is wrong, because "learning" dose not refer to "I". Learning is not perform by "I". we have to say
learning gmat incorrect way, I fail on the test.
this is correct, Learning refers to "I" and "I" perform "learning".
"because of learning" can be correct
failure because of learning gmat incorrect way is normal
this is correct. we dont have any person who perform action of learning. we say about general action of learning.