Your ability to argue is of no（

Your ability to argue is of no（ ）if you get your facts wrong.
A、ground
B、avail
C、practice
D、consequence
【正确答案】：B
【题目解析】：of no/little avail：毫无用处，ground：根据，选B。句意：要是论据错误，你辩论的本领再高也没有用。