I'd mess with them. Give them a choice - to disarm a bomb that will demolish their building, preventing their certain death but doing that detonates another bomb loaded with bioweapons in another scam call center. If they chose to disarm the biological weapon, the bomb in their office complex explodes, destroying the building the call center is in.
"You have one minute. Choose wisely. Or don't - both bombs will explode then."
I'd mess with them. Give them a choice - to disarm a bomb that will demolish their building, preventing their certain death but doing that detonates another bomb loaded with bioweapons in another scam call center. If they chose to disarm the biological weapon, the bomb in their office complex explodes, destroying the building the call center is in.
"You have one minute. Choose wisely. Or don't - both bombs will explode then."