Since the early nineties, the trend in most businesses has been toward on-demand, always-available products and services that suit the customer's______rather than the company's.
【正确答案】 D
【答案解析】解析：题干：自90年代初期开始，贸易开始倾向于提供实时所需产品和服务；这些产品和服务以便利客户为宗旨，而不是便利自己的公司。benefit利益，好处；availability有效性，实用性；suitability合适，适当；convenience方便。在本句中只有convenience最符合题意。