Final answer:
An accidental death benefit does not pay out if the death is caused by an excluded event, which is typically specified in the insurance policy's list of exclusions.
Step-by-step explanation:
From the options provided, the condition that is NOT required for an accidental death benefit to be paid is 'c) Death caused by an excluded event'. The accidental death benefit typically pays out when the policyholder's death occurs within a specified time frame, results directly from an accident, and occurs during the policy term. However, if the death is due to an excluded event such as certain risky activities or illegal behavior, it is generally not covered by such policies. Each policy has a list of exclusions which specify conditions or events that are not covered.