Final answer:
The rider that will help Diane when she is confined to a nursing home with a terminal illness is the accelerated death benefit rider.
Step-by-step explanation:
The rider on Diane's life policy that will help her out when she is confined to a nursing home with a terminal illness is called the accelerated death benefit rider. This rider allows policyholders to receive a portion of their death benefit while they are still alive if they are diagnosed with a terminal illness and are expected to pass away within a certain timeframe, typically six months to a year. The funds can be used to cover medical expenses or any other needs the policyholder may have.