Why 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 toshutdown ports when a switch is connected to the port

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

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