At the meeting an important problem and it attracted everyone’s attention.
A. came across
B. came to
C. came up
D. came about
网友回答
A. came across
B. came to
(答案→)C. came up
D. came about
解析：短语动词辨析。A遇见，发现；B涉及到，谈及；C走近；出现；发芽；D形成，产生，发生；句意：在会议上出现了一个重要的问题，吸引了每个人的注意力。根据句意说明C正确。