In a crossing situation，the stand-on vessel should normally（）.

A.take action to cross ahead of the other vessel

B.take action to pass astern of the other vessel

C.maintain course and speed

D.change course and increase speed

仔细阅读“给定资料1～6”，简要概括资料的主要问题，并作简要评价。
[要求] 准确、全面、简明，不超过250字。