A link$-$layer switch in the network topology below has the following switching table:

The switch receives the following frame on Port $1.$ What does it do$?$

$642B13456112642B1345611308004500$

$00284bb740008006ffc280e24a90c0a8$

$01020050cec50a1978ac617498a95010$

A$.$ Add $64$:$2$B:$13$:$45$:$61$:$13$ into Port $1$ of its switching table and forward the message on

ports $2$ and $4.$

B$.$ Add $64$:$2$B: $13$:$45$:$61$:$13$ into Port $1$ of its switching table and forward the message on

port $3.$

C$.$ Update Port $3$ in its table to $64$:$2B$:$13$:$45$:$61$:$13$ and forward the message on port $3.$

D$.$ Ignore it since the source MAC address is not in its forwarding table.