What is the function of the peer ignore command?

What is the function of the peer ignore command?
A . Deletes a BGP peer.
B . Retains all configurations of the peer, and maintains the BGP peer relationship with the peer, but does not receive the routes sent from the peer.
C . Retains all configurations of the peer, and maintains the BGP peer relationship with the peer, but does not advertise routes to the peer.
D . Retains all configurations of the peer, interrupts the BGP peer relationship with the peer, and clears all related routing information.

Answer: D