At the meeting the old man some good advice about bringing down the market price of onio

问题补充：

At the meeting, the old man some good advice about bringing down the market price of onion.

A. came about

B. came along

C. came up with

D. came out

答案：

A. came about

B. came along

(答案→)C. came up with

D. came out

解析：短语辨析。A形成，产生；B出现，取得进展；C想出；D出版，发行；句意：在那次会议上，关于如何降低葱的价格，那位老人提出了很好的建议。故C正确。