请牛人帮忙看看这道gwd-25-q24

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后面的WHICH就是指代PRICES了？

我感觉应该指代EFFICIENCY比较好

还是A说得通

你觉得呢？