我做这道题的时候很快排除了A,C,D。 然后排除了B, 因为我觉得delay应该用复数。但是看解释上说B不对是因为 “55 percent more delays” 不clear, 请问这个说法那里不清楚呀？

88. 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

Delay:

–noun

4.	the act of delaying; procrastination; loitering.

5.	an instance of being delayed: There were many delays during the train trip.

6.	the period or amount of time during which something is delayed: The ballet performance began after a half-hour delay.

其实句子愿意是上面解释中的5, 我想主要因为B答案中是delay，而不是delays，这样理解成是造成一次delay延长了55 percent.

4.	the act of delaying; procrastination; loitering.

5.	an instance of being delayed: There were many delays during the train trip.

6.	the period or amount of time during which something is delayed: The ballet performance began after a half-hour delay.

其实句子愿意是上面解释中的5, 我想主要因为B答案中是delay，而不是delays，这样理解成是造成一次delay延长了55 percent.

4.	the act of delaying; procrastination; loitering.

5.	an instance of being delayed: There were many delays during the train trip.

6.	the period or amount of time during which something is delayed: The ballet performance began after a half-hour delay.

其实句子愿意是上面解释中的5, 我想主要因为B答案中是delay，而不是delays，这样理解成是造成一次delay延长了55 percent.