乌龟向野兔发起挑战赛跑，野兔开心的同意了，然后迅速跑到了前面，把行动迟缓的乌龟甩在了后面，野兔很自信自己会赢，于是停下来打了个盹，同时，乌龟以缓慢但恒定的速度走完了全程。野兔醒了，当它跑到终点时，发现乌龟已经在那里了。下面哪张图和上述对比赛的描述相匹配，并正确的展示了这2只动物走过的距离$d$与从开始到结束这段时间$t$的关系？

A. [Graph A]

B. [Graph B]

C. [Graph C]

D. [Graph D]

E. [Graph E]

1. 2019 AMC 8 官方解析

龟兔赛跑．兔子一马当先甩开乌龟．自认能赢，于是兔子打了个盹．而同时，乌龟慢慢悠悠一直在走着．等兔子醒来跑到终点，发现乌龟已经到了．下列图示中正确反映出发时间和两只动物的距离的是？

A. We find it in this way:

The hare napped for a while hence there should be straight line ( segment ) So C and E are excluded. Next slopes represent the velocity. The tortoise with small speed won, hence it would reach the high end of distan ce with a smaller time value. So B.