Pretty much Scenario B.... I have the mental image of a moat filled with ravenous, man-eating crocodiles. Just inside the moat is a large minefield filled with super sensitive claymores, with hair triggers. Anyone that gets past these two defenses must then clear a barbed-wire fence, inside of which are dozens of AI-powered robot dogs. Evade the dogs and then there's an inner perimeter of sniper towers. Finally there is 6-foot thick reinforced cement-walled structure with biometric entry. Inside of this is a triple-locked state-of-the-art vault. Inside the vault, is a post-it note, on which is written the word "password."
This is the Cold-card. An air-gapped, high tech post-it note securing the world's weakest password.
