Which statement about the NHRP network ID is true?

Which statement about the NHRP network ID is true?

A.
It is sent from the spoke to the hub to identify the spoke as a member of the same NHRP domain.

B.
It is sent from the hub to the spoke to identify the hub as a member of the same NHRP domain.

C.
It is sent between spokes to identify the spokes as members of the same NHRP domain.

D.
It is a locally significant ID used to define the NHRP domain for an interface.