道GWD题目，请指点

GWD1-Q7

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.

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

B.    that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times

C.    that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio

D.    CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio

E.     CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times

I think the answer is B, but the right answer is C.

Thank you