What does the non-silent option along with the mode of auto or desirable do?

A. Configures the interface not to send negotiation notifications
B. Configures the interface to send negotiation notifications
C. Configures the interface to send negotiation notifications only ifdetected
D. Configures the interface to forward all CDP notifications

B. This option forces an interface, if configured with desirable or auto, to forcibly send notifications. When a port is configured in auto mode, it requires another adjacent switch to send PAgP notifications. This option forces the notifications with the desirable mode.