难题 请教

棒棒dudu

In 1997, despite an economy that marked its sixth full year of uninterrupted expansion with the lowest jobless rate in a quarter century, the number of United States citizens declaring themselves bankrupt has jumped by almost 20 percent, at 1.34 million.

(A) declaring themselves bankrupt has jumped by almost 20 percent, at
(B) declaring themselves bankrupt jumped by almost 20 percent, to
(C) who declared themselves bankrupt has jumped by almost 20 percent, to
(D) who declared themselves bankrupt jumped almost by 20 percent, at
(E) to declare themselves bankrupt jumped almost by 20 percent, at
我选的是C 但是错了。请各位朋友帮我分析 解释一下应该选哪个 谢谢

lafuria

IMO B

lafuria

has jumped  时态不对啊 明明只是1997一年，jump..to... 推得B