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

Hello Lionila,

I will be glad to help.

Let us analyze these two expressions in a very simplistic way.

We put our effort "in doing" something. For example, The teachers have put a lot of effort in setting the question papers.

However, we measure the efficiency "of something". For example, The efficiency of the software has been proven by its popularity.

In this official sentence, we see the first usage. Hence, the usage of the phrase "efficiency in" is correct.


Hope this helps.
Thanks.
Shraddha