倍数问题 新prep181

bingzhix

The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

A. doubling the increase of

B. doubling that of the increase in

C. double as much as the increase of

D. twice as many as the increase in

E. twice as many as the increase of

answer A, i chose B   double的难道不应该是the number吗？为什么是increase啊？ 难道doubling做了rose的伴随状语（而非结果状语），然后。。。？好晕！
求NN 求解释 小妹先谢过。

xohe赵

the increase 就是一个数。。。。