信函语气与礼貌策略 — 国际贸易选择题
题目
回复客户关于订单交期延误的询问信时，以下哪一句的语气最符合英文商务信函的You-attitude（对方立场）与礼貌策略原则？
A. We cannot tell you when the shipment will arrive.
B. You failed to read our earlier letter about the delay.
C. We regret the delay and will inform you of the exact delivery date as soon as it is confirmed.
D. It is none of our responsibility for the delay in delivery.