In Health Insurance Plans, Coinsurance Is A(n)

In health insurance plans, coinsurance is a(n)

A) initial amount the insured will have to pay before the insurer will pay any of the covered expenses.
B) proportional sharing of medical costs by the insurer and the insured.
C) maximum amount an insured has to pay out of pocket in a given year.
D) maximum amount an insured can be reimbursed by an insurer.