Answer:
C. The amount you pay the health insurance company every month for coverage.
Step-by-step explanation:
A premium is an amount that is needed to be paid [periodically] to an insurer/insurance policy. By the word, periodically, this means that an amount (money) is paid on a regular occurrence, which in this case, is every month.
By this definition, the correct answer to be concluded is answer choice, "C."