What happens if no frames from that MAC address are seen by the switch within the MAC table age-out time?

A port has been configured with port-security dynamic with one allowable MAC address.

What happens if no frames from that MAC address are seen by the switch within the MAC table age-out time?
A . Switch will allow the next MAC address it sees to have access on that port
B . No MAC addresses will be allowed access on that port
C . Only the original MAC address will ever be allowed on that port
D . All MAC addresses will be allowed access on that port

Answer: A