问题

As middle school students, we should study hard for the future.- I think so. _____ we study now, _____ future we’ll have.
A:The hard, the good
B:The harder, the better
C:The hardest, the best
D:The hard, the best;
B:The harder, the better
C:The hardest, the best
D:The hard, the best;
正确答案是: