(单选题)We are talking about the subject of living wills, patient rights and self- determination in terminal health care. What does “terminal” mean here in paragraph 2?

A、 Station where transport vehicles load or unload passengers or goods.
B、 A contact on an electrical device (such as a battery) at which electric current enters or leaves.
C、 Either extremity of something that has length.
D、 Causing or ending in or approaching death.