题目内容：
According to John Christopher Hamm, from the boxing duel between Chen and Wu, we can notice something behind this event:
A.The emphasis of their birth places.
B.This competition finally reached a draw.
C.The adoption of Western boxing rules in this competition.
D.The claim made by both the organizer and competitors that their purpose was to elevate the status of national martial arts, or to dispel the mystery that had veiled this ancient tradition.
参考答案：