$23.$ ?During the appraisal meeting, a supervisor must:a $.$ ?emphasize that everybody in the same job in the same department is evaluated using different standards.b $.$ ?be prepared to support or document ratings by citing specific illustrations and instances good or poor performance.c $.$ ?make promises for training or promotion, even they are not likely to materialize in the foreseeable future.d $.$ ?avoid having any discussions about possible opportunities for the employee's future.