如下程序的输出结果如下(     )
#include
void main( )
{
  char str[][20]={"china","hubei","wuhan"};
  int i ;
  for(i=0;i<3;i++)
  {
    printf("%c-", *(str[i]+i));
  }
}
A、c-u-h-
B、china-hubei-wuhan-
C、c-b-a-
D、ina-ubei-wuhan-