求助一道语法题 CEO’s now earn

jlliner

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

ABC 为什么要用be earn不直接用earns呢？有be earn这种用法吗
E选项为什么不可以是indicate A B这种结构  不是省略了that呀

jlliner

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