Which two commands can protect against this problem?

A rogue device has connected to the network and has become the STP root bridge, which has caused a network availability issue.

Which two commands can protect against this problem? (Choose two.)
A . switch(config)#spanning-tree portfast bpduguard default
B . switch(config)#spanning-tree portfast bpdufilter default
C . switch(config-if)#spanning-tree portfast
D . switch(config-if)#spanning-tree portfast disable
E . switch(config-if)#switchport port-security violation protect
F . switch(config-if)#spanning-tree port-priority 0

Answer: A,C