$45$ of $60.$ When creating a custom record type, how do users establish a parent$-$child relationship between the custom record type and its pare type?

A$.$ Add a new Link. Set the List$/$Record to Parent record type, and select Record Is Child.

B$.$ Add the child record in the Child Records tab.

C$.$ Add the parent record in the Parent Records tab.

D$.$ Add a Custom Field. Set the List$/$Record to Parent record type, and select Record Is Parent.