Which of the following riders can be used to cover the life of an additional insured who is an unrelated business partner?

The nonfamily rider is specifically designed to provide coverage for individuals who are not related by blood or marriage, making it suitable for covering the life of an additional insured who is an unrelated business partner. This rider can extend benefits to a partner in a business context, which allows policyholders to ensure that their business tied to that partner is protected in the event of their death.

In contrast, the family rider generally covers dependents or family members, thus it would not apply to a business relationship. Accidental death riders typically pay an additional death benefit if the insured dies due to an accident, rather than addressing the relationships between insured parties. A term rider is designed to provide temporary coverage for a specified period and is not focused on the relationship between insured individuals as a nonfamily rider would be.