If the function declaration is void fun (char * a, int n, int & m); 
Which of the following statements is true ？
A、char str[10];
int *p, m;
fun( str, m, p ); 
B、char *p = new char[10];
int n, m;
fun( p, m, &n ); 
C、char *p = new char[10];
int n, m;
fun( p, m, n ); 
D、char *p = new char[10];
int n;
fun( p, &n, 6 );