GWD-TN-14第18题大家选什么？谢谢！

Over the course of the eighteenth
century, the average output of ironwork tripled as a result of several
improvements in blowing machinery and because coal replaced charcoal as the
fuel used in the smelting of iron ore.

A.     
Over the course of the eighteenth century, the average
output of ironwork tripled as a result of several improvements in blowing
machinery and because coal replaced charcoal as the fuel used in the smelting
of iron ore.

B.     
Over the course of the eighteenth century a tripling in the
average output of ironwork was due to the replacement of charcoal by coal for
the fuel used in the smelting of iron ore, in addition to several improvements
in blowing machinery.

C.     
With charcoal’s being replaced by coal as the fuel used in
the smelting of iron ore and several improvements in blowing machinery, the
average output of ironwork tripled over the eighteenth century.

D.     
The replacement of charcoal with coal for the fuel used in
the smelting of iron ore and several improvements in blowing machinery, the
average output of ironwork tripled over the eighteenth century.

E.      
Charcoal being replaced by coal as the fuel used in the
smelting of iron ore, and several improvements in blowing machinery, which
tripled the average output of ironwork over the course of the eighteenth
century.

不算致命吧...我觉得致命伤只有主谓一致和时态...

先说B，the tripling of ...is,这个算是挺高频的谓语动词名词化的错误，另外due to ,in addition to不平行吧，in addition 地位有点变次要，而且第二个due省略的情况没见过，最好能提供个例子。

C，改变了原句的因果关系，我不记得one's being 是不是一定错，不过这个表达完全可以用replacment 代替。

至于A，功能上的平行是超过形式上的平行的，就像这个两个都是表原因，虽然一个短语一个句子，但是毕竟没有更好的选项了，还是能够接受的,而且第一个原因确实比较简略，短语即可概括，后者则相对复杂，用句子才能表达清楚。