Answer:
a. insurance premium
Step-by-step explanation:
Insurance copay is the fixed amount that an insured person pays to cover the insurance policy. Moreover, it is linked to the health sector. Therefore, option B is incorrect.
Insurance coverage is the coverage for an insurance policy. It can be dictated as risk or liability. Therefore, option C is wrong.
Out-of-pocket expense is a direct expense, and it is not related to the insurance plan. Therefore, option D is false.
An insurance premium is an amount we have to pay for the insurance plan we accept to ensure for various purposes. Therefore, option A is the answer.