Insurance companies base their costs on __________.

Insurance companies base their costs on __________.
A、the pool of people sharing the risk
B、the cost each member of the pool pays
C、the theory of probability
D、past experience
【正确答案】：C
【题目解析】：insurance 保险 ; 保险业 ; 保险费 ; companies 公司 ; 商号 ; 商行 ;base 根基 ; 基底 ；costs 费用 ; 花费 ; 价钱 ; 保险公司的成本是以概率论为基础的。