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：benefit“利益”；availability“可用性”；suitability“适合”；convenience“便利”。由“products and services”可知，此处应为为了客户的便利，而不是商人的利益，故选D。