In the process of establishing an LDP session, the active party will first send Initialization information to negotiate parameters. If the passive party does not accept the negotiated parameters, which of the following packets will be sent?

In the process of establishing an LDP session, the active party will first send Initialization information to negotiate parameters. If the passive party does not accept the negotiated parameters, which of the following packets will be sent?
A . Hello Message
B . Error Notification Message
C . Keepalive Message
D . Initialization Message

Answer: B