关于og94题的疑问

glw1900

The recent surge in the number of airplane flights has
clogged the nation’s air-traffic control system, to lead
to 55 percent more delays at airports, and prompts
fears among some officials that safety is being
compromised.
(A) to lead to 55 percent more delays at airports,
and prompts
(B) leading to 55 percent more delay at airports and
prompting
(C) to lead to a 55 percent increase in delay at
airports and prompt
(D) to lead to an increase of 55 percent in delays at
airports, and prompted
(E) leading to a 55 percent increase in delays at
airports and prompting
这题E是正确答案，
关于c选项，我明白他是那个in delay应该改成in delays，但是，答案的解释说，是因为to lead 和prompt不平行，这个解释我觉得说不通呀，因为前后都是不定时，后面那个把to省略掉不行吗，还是有什么其他的原因呢，希望指点，谢谢

liran95

ing 放句末不是伴随就是表结果。楼主记住就好了。to do是表示目的的