NO.PZ2020011901000036
问题如下：
In health care insurance, is it usually the case that:
选项：
A.Premiums cannot increase from year to year
The insurance company can change premiums as it reassesses risks
C.Premiums increase with the age of the policyholder
Premiums can increase as the overall cost of health care increases
解释：
D. Health insurance premiums can increase from year to year but the increase should only reflect overall increases in health care costs.
Premiums can increase as the overall cost of health care increases，能翻译一下么？感觉跟课件不太一样，这个选项中成本的增加没说是什么成本？
