What do guaranteed premiums in an insurance policy ensure?

Guaranteed premiums in an insurance policy ensure that the premium amount remains fixed for the duration of the policy, regardless of any changes in circumstances such as the insured's health or age. This characteristic provides policyholders with financial predictability and protection against potential increases in premium rates, which can occur in some insurance products over time. By locking in the premium rate, individuals can budget more effectively for future payments without fearing that rising costs will disrupt their financial planning.

The other options do not accurately reflect the nature of guaranteed premiums. While premiums may indeed change under certain policy structures, guaranteed premiums specifically protect against such fluctuations. Therefore, option B correctly captures the fundamental essence of guaranteed premiums in an insurance policy.