有表H_TEST（如下图所示）。EMP_ID列为员工编号列，唯一标识员工。EMP_NAME列为员工姓名列。MNG_ID列为其直属上级的EMP_ID值。现需要将EMP_ID为2的员工及其下属查询出来，以下哪条SQL是正确的？ A A、select h.* from h_test h start with emp_id=2 connect by prior emp_id=mng_id; B、select h.* from h_test h start with emp_id=2 connect by prior mng_id=emp_id; C、select * from h_test where emp_id=2 connect by prior emp_id=mng_id; D、select h.* from h_test h where mng_id=2 connect by prior emp_id=mng_id;