求助PREP2007 64

bitieming

64. (27882-!-item-!-188;#058&003676)

The majority of scientists believe that to reduce and stabilize atmospheric concentrations of carbon
dioxide, emissions must be cut at the source by fossil fuels that are burned more efficiently and, in
some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether.

(A) fossil fuels that are burned more efficiently and, in some cases, by alternatives such as
hydrogen fuel cells that can replace fossil fuels altogether
(B) fossil fuels that are burned more efficiently and, in some cases, those that are replaced
altogether with alternatives such as hydrogen fuel cells
(C) burning fossil fuels more efficiently and, in some cases, by replacing fossil fuels altogether with
alternatives such as hydrogen fuel cells
(D) more efficiency in the burning of fossil fuels and, in some cases, by alternatives such as
hydrogen fuel cells that can replace fossil fuels altogether
(E) the more efficient burning of fossil fuels and, in some cases, by fossil fuels that are replaced
altogether with alternatives such as hydrogen fuel cells

答案选C，不用考虑C中buring和replacing的逻辑主语么？这两个动作的逻辑主语缺失呀

bitieming

myancamel

这两个都是动名词形式，本身是被动语态的施动者，不是现在分词