Which of the following is an example of a "benefit trigger"?

A benefit trigger is an event or condition that activates the provision of benefits in an insurance policy, particularly in the context of health and disability insurance. In this case, receiving a diagnosis of a specific medical condition is a clear example of a benefit trigger because it directly leads to the availability of benefits as specified within the policy. Many health insurance plans or disability policies outline particular conditions under which the insured can claim benefits.

The other options do not serve as direct triggers for benefits. For example, turning 65 years old generally marks the eligibility for Medicare, but it does not directly trigger benefits under most disability or life insurance policies. Having a high income, while potentially important for qualifying for certain types of insurance or determining premium rates, does not directly activate benefits. Completing an insurance course is unrelated to the activation of benefits in a policy, as it pertains more to qualifications and continuing education rather than a health-related event. Thus, the correct choice aptly reflects the concept of what constitutes a benefit trigger in insurance.