43. The United States petroleum industry’s cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade.

(A) The United States petroleum industry’s cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade.

(B) The United States petroleum industry’s cost by the end of the decade to meet environmental regulations is estimated at ten percent of the price per barrel of refined petroleum.

(C) By the end of the decade, the United States petroleum industry’s cost of meeting environmental regulations is projected at ten percent of the price per barrel of refined petroleum.

(D) To meet environmental regulations, the cost to the United States petroleum industry is estimated at ten percent of the price per barrel of refined petroleum by the end of the decade.（E）

(E) It is estimated that by the end of the decade the cost to the United States petroleum industry of meeting environmental regulations will be ten percent of the price per barrel of refined petroleum.

讨论过很多次了，cost to sb/sth of doing是正确的用法。

B除了cost的用法错误之外，还有别的错误吗？是不是B的句型不好？如果把B改成如下行不行？

(B) The cost by the end of the decade to the United States petroleum industry of meeting environmental regulations is estimated at ten percent of the price per barrel of refined petroleum.

(B) The cost by the end of the decade to the United States petroleum industry of meeting environmental regulations is estimated at ten percent of the price per barrel of refined petroleum

Hereby, "by the end of the decade" modify the cost

It is estimated that by the end of the decade the cost to the United States petroleum industry of meeting environmental regulations will be ten percent of the price per barrel of refined petroleum

Here, "by the end of the decade" modify that clause.