A producer adds optional coverages to the insured's policy, resulting in an increased policy premium. How long must the producer keep evidence of the insured's consent?

The correct choice indicates that a producer must keep evidence of the insured's consent for a duration of three years. This requirement is in place to ensure that there is a verifiable record of the insured's approval when optional coverages are added to a policy, especially since these additions can significantly affect the policy premium and the extent of coverage.

Retention of such evidence for three years allows for a reasonable period during which disputes regarding the insured's consent could arise. This timeframe aligns with typical statutory requirements related to documentation retention in the insurance industry, helping to protect both the insured and the producer in potential clarifications and audits.

The other options, while representing plausible durations for record-keeping practices, do not align with the specific regulatory or industry-standard expectations set forth for maintaining evidence of consent for alterations to an insurance policy. Thus, the three-year period is the most appropriate and compliant choice in this context.