问题如下：
What is variable life insurance?
选项：
A.Whole life insurance where the policyholder chooses how funds will be invested
B.Whole life insurance where the policyholder can vary premiums from year to year
Term life insurance that can be renewed
Life insurance where the policyholder can ask for an early payout in certain circumstances
解释：
A. In variable life insurance, the policyholder chooses how surplus funds are invested, and the final payout may increase if investments do well.
老师您好，这道题问的是指寿险的变量是什么，这个是指什么方面的变量呢？B选项为什么不对？
