下面进行二分搜索的正确代码是

A.def BSearch(data,x): low=0 high=len(data)-1 while(low＜=high): mid=(low+high)//2 if(data[mid]==x): return mid elif(data[mid]＜x): high=mid-1 else: low=mid+1 return -1#B.def BSearch(data,x): low=0 high=len(data)-1 while(low＜=high): mid=(low+high)//2 if(data[mid]==x): break elif(data[mid]＜x): low=mid+1 else: high=mid-1 return -1#C.def BSearch(data,x): low=0 high=len(data)-1 mid=(low+high)//2 while(low＜=high): if(data[