Which one of the following statements is incorrect according to the fable Learning How to Walk in Handan?
A.
The young boy in the fable could only crawl back to Yan.
B.
The young boy in the fable failed to go to Handan.
C.
Both Zhao and Yan were the states in the Warring States period.
D.
The people in Handan were famous for their walking posture.