Final answer:
A living will refers to the right of an individual to determine whether extraordinary means should be used to keep them alive. option (A)
Step-by-step explanation:
The right of an individual to determine whether extraordinary means should be used to keep them alive is referred to as a living will.
A living will is a written legal document that details specific interventions a person wants, such as whether they want to receive life-extending treatments. It can also include a health care proxy, which appoints a specific person to make medical decisions for them if they are unable to do so themselves.