They try to find out the reason for the problem_______they could _英语解答

They try to find out the reason for the problem_______they could salve it
A.even though B.even since C.so that D.only when
请详细解释一下、、、、、、、、、

人气：429 ℃　时间：2020-03-24 14:57:06

解答

C 表示目的.以便于,为了
他们试图找到这个问题的原因以便于他们能够解决它.