Though many people witnessed the accident, they were not sure about the exact consequences.

A. orders

B. processes

C. results

D. causes

【答案解析】本题正确选项C。译文：虽然许多人目睹了这次事故，但他们不清楚确切的结果。解析：在四个选项中，A项order“命令；订单”；B项process“过程，进程”；C项result“结果”；D项cause“原因”。题中画线词consequence“结果，后果”和C项result意思最接近，因此，依据题意在四个选项中最符合题意的选项是C。