gwd22最后一道题迷茫中

larkspur

If current trends continue, by the year 2010 carbon emissions in the United States
will soar to a level more than one-third higher than were those in 1990, according to official projections.
A.will soar to a level more than one-third higher than were those

B.will soar to a level more than one-third higher than that

C.would soar to a level more than one-third higher than is was

D.would soar to a level more than one-third higher than those

E.would soar to a level more than one-third higher than they were
答案选的是B,我觉得应该是D,因为B中的that没有指代对象啊，求大神指教

huaxilideyuer

和a level 对应，所以把有those 的全去掉~