单选题
He bought his house on the ______ plan, paying a certain amount of money each month.
【正确答案】
C
【答案解析】division意为“分开，区分”：premium意为“奖金，保险费”；installment意为“分期付款，分期收款”；investment意为“投资，投入”。根据后面的paying a certain amount of money each month可知，应选installment。