如下有关const的应用，正确的是：

A、const int N=3;const int arr[N] = {1,2,3}; arr[0] = 6; ;
B、const int N=3;const int arr[N] = {1,2,3}; int * p = arr;
;
C、const int N=3;const int arr[N] = {1,2,3}; int const* p = arr;
//或者 const int *p=arr;;
D、 const int N=3;const int arr[N] = {1,2,3}; const int *p=arr;