【已刪除】下列書信內容屬何種函件?"Our ag e nts in Br ussels h a ve asked us for quotations for 30,000 decorative teapots to be exported to Belgium. Please let us know what quantities you ar e able to deliver at r egular inter vals, quoting your best ter ms f.o .b. A ms t erd am."
(A)inq u ir y
(B)off er
(C)counter-offer
(D)order