The four classes selected for a calibration are commended and given a certain reward. From the perspective of learning, the two classes A and B are better than the two classes C and D. Based on this, together with which of the following judgments may be concluded that "Class E is better than Class D"? ['ss A. E is better than Class C.', 'ss B. E is better than Class A.', 'ss C. E is worse than Class B.', 'ss D. Class B is better than Class A.']