一道弱弱的语法题，求指导

melon900308

Q7:GWD32-Q10

The soft drink company’s flat earnings for the second quarter reflect the success of both its restructured global bottling system and the extent to which poor currency exchange rates keep down profits for multinationalcompanies



A.reflect both the success of its restructured global bottling system and the extent of poor currency exchange rates keeping

B.reflect both the success of its restructured global bottling system and the extent to which poor currency exchange rates are keeping

C.reflect both the success of its restructured global system and the extent of poor currency exchange rates keeping

D.both reflect the success of its restructured global bottling system and to what extant poor currency exchange rates are keeping

E.both reflect the success of its restructured global bottling system and to what extent poor currency exchange rages are keeping

daisyliuliu

我想应该选B。
考点：1。both...and...后面所带的内容一定要平行
     2。extent的用法

acerjeff

LZ这题目是不是抄错了。A选项咋跟原文不同，DE都有错字呢？