Mr. Smith has cancelled his trip because an urgent matter has come up which requires his immediate attention.
A．史密斯先生推迟了旅行，因为发生了一件大家都十分关注的突发事件。
B．史斯密斯先生取消了旅行，因为发生了一件紧急的事情需要他立即处理。
C．史密斯先生取消了旅行，因为有一件棘手的事情需要他予以密切关注。
D．史密斯先生推迟了旅行，因为要处理一桩已引起公众关注的突发事件。

A. to become leaders in business and art worlds
B. to co-operate with other members of MOCA
C. the new ways of communication with people
D. about the relationship among art, business and community