弱弱的请教一道语法小题,恳请NN们指点

pisceskitty

GWD上的一道小题

A recent review of pay scales indicates that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times in 1980.

 

1. that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times
2. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times
3. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio
4. CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio
5. CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times
   
   答案是B...

恳请帮忙分析下,ACDE分别错在哪儿??

非常感谢.

shamoguzhou

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=59319&page=1

pisceskitty

3q so much..