问题如下：
Which of the following cash flows belong to the Stochastic amount/Deterministic time category?
选项：
A. Completely new contracts
Renewal of Expiring Contracts
Loans or mortgages
bank’s
decisions to withdrawals of credit lines
解释：
考点：对A Taxonomy of Cash Flows的理解
答案：B
解析：
选项A属于Stochastic
amount/Stochastic time
选项B属于Stochastic
amount/Deterministic time
选项C属于Stochastic amount/Stochastic
time
选项D属于Deterministic
amount/Stochastic times
老师，B选项为什么是金额不确定但时间确定呢？
renew a expiring contract, 已经过期了啊，不知道还能renew 到什么时候， 但金额如果是renew expiring contract 的话，是不是应该和之前是一样的，就是一定的了呢？
