Time left $0$:$25$:$42$

The system for "general nuclear war" developed secretly in the US in $1960,$ which would lead

to the deaths of at least $600$ million people if enacted, was known as what?

Select one:

a$.$ Mutually Assured Destruction

b$.$ Nuclear Deterrence

c$.$ The Single Integrated Operational Plan

d$.$ "Launch on Warning" Protocol