OG一问

OG：
12. （Formulas for cash flow and the ratio of debt to equity do not apply to new small businesses in the same way as they do to established big businesses, because they are growing and are seldom in equilibrium.）

（D） Because new small businesses are growing and are seldom in equilibrium, formulas for cash flow and the ratio of debt to equity do not apply to them in the same way as to established big businesses.

Question: OG解释说：In A and B, “do not apply to... in the same way as they do to” is wordy and awkward. D, the best choice, says more concisely in the same way as to. 我知道A是错的，但为什么A中把“they do”补出是不对的呢？

谢谢