How is the bfd interval configuration on the interface disconnected?

A network engineer is implementing BFD configuration changes on a customer’s equipment.

How is the bfd interval configuration on the interface disconnected?
A . The status of the interface changes.
B . The IPv4 or IPv6 address configuration on the interface changes.
C . It is automatically disconnected when the BFD-configured subinterface is removed.
D . It is automatically disconnected when the BFD main interface is removed.

Answer: D