Prices of food in that area sharply since word came that the war would break out soon.A.

问题补充：

Prices of food in that area sharply since word came that the war would break out soon.

A. were cut down

B. were rising

C. have been brought down

D. have been going up

答案：

A. were cut down

B. were rising

C. have been brought down

(答案→)D. have been going up

解析：句意，有传言说要爆发战争，这一地区食品价格快速的增长。由于要爆发战争，所以按照常理物价会长，又因为since从句可知应用现在完成进行时。故选D。