______difficult the task is,all the menbers on the team have made up their minds to fulfill it

题目

______difficult the task is,all the menbers on the team have made up their minds to fulfill it
in time.A NO matter B As C Whatever D However
为什么不能选B或者C

答案

A no matter 不管
不管任务有多难,这个团队的成员都下定决心完成它.
B:as
表示和什么一样,或者表示原因,根据句子意思,这里讲不通
C：whatever
意思是“不管什么”也讲不通