有一题 A.Instead of collaborating, one of the most famous rivalries began when A’s reconstruction of xxx was challenged by B, and A’s reconstruction of xx proved to be mistaken. B.Instead of cooperating, one of the most famous rivalries began when A’s reconstruction of xxx was challenged by B, C. Instead of cooperating, A and B involved in one of the most famous rivalries when A challenged B’s reconstruction of xxx, 是不是选C呢?狗主没给答案,我比较强迫症啊,想确认下啊!大家帮帮忙,下面是原帖 http://forum.chasedream.com/GMAT_Math/thread-586096-1-1.html