D, definitely. Blackhole MAC addresses are the way to go if you want to, you know, blackhole some traffic. It's like the network equivalent of putting your coworker's stapler in jello.
B is the correct answer. Static MAC address entries are manually configured and won't age out. I've had to deal with that a few times in my career, and let me tell you, it's a real pain.
Static MAC address entries, of course! I mean, who wants to manually configure their switches every time a MAC address changes? That's like trying to herd cats.
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