The show port-security interface f0/1 command lists a port status of secure-down. Which one of the following answers must be true about this interface at this time?
a. The show interface status command lists the interface status as connected.
b. The show interface status command lists the interface status as err-disabled.
c. The show port-security interface command could list a mode of shutdown or restrict, but not protect.
d. The show port-security interface command could list a violation counter value of 10.