【已刪除】下列書信內容屬何種函件？"While appreciating th e attractiv e design of your high-rise bicycles, we suggest you make s ome al lowance. A 10% r eduction would facilitate the transaction and help introduce y our goods to the r apidly growing m ark et h ere."
(A)inquiry
(B)offer
(C)counter-offer
(D)sales
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