单选题 Customers often defer payment for as long as possible.

【正确答案】 C

【答案解析】[解析] 句意：顾客经常尽可能久地推迟付款。defer推迟。postpone推迟，迟延。make制造；整理。demand要求。obtain得到。postpone与defer意思相近，故选C。