对于一个名为v_arr的类型为PL/SQL表类型的变量，以下对它进行引用形式正确的是（）

A.v_arr arr_type;
B.v_arr is arr_type;
C.v_arr of arr_type;
D.v_arr arr_type%type;

A.type array arr_type[emp.ename%type] index by binary_integer;
B.type table arr_type[emp.ename%type] index by binary_integer;
C.type arr_type is table of emp.ename%type index by binary_integer;
D.type arr_type is pl_sql table of emp.ename%type index by binary_integer;