Which option is NOT a way to lower insurance premiums?

Avoiding coinsurance does not directly contribute to lowering insurance premiums. Coinsurance is a cost-sharing mechanism wherein the policyholder agrees to pay a certain percentage of the total cost of a claim after the deductible has been met. While avoiding coinsurance means that the policyholder would not share in those costs, it typically does not influence the premium itself, which is the amount paid for the insurance coverage.

In contrast, increasing deductibles generally leads to lower premiums since the insurer's risk is reduced when policyholders agree to pay more out of pocket for initial costs. Improving a credit score can positively impact insurance rates, as many insurers use credit history in their risk assessment. Bundling policies, such as home and auto insurance, often yields discounts, thereby reducing overall insurance costs. Thus, avoiding coinsurance does not fit within the strategies typically utilized for reducing premiums.