Why is BPDU guard an effective way to prevent an unauthorized rogue switch from altering
the spanning-tree topology of a network?

A.
BPDU guard can guarantee proper selection of the root bridge.

B.
BPDU guard can be utilized along with PortFast to shut down ports when a switch is
connected to the port.

C.
BPDU guard can be utilized to prevent the switch from transmitting BPDUs and
incorrectly altering the root bridge election.

D.
BPDU guard can be used to prevent invalid BPDUs from propagating throughout the
network.