Opportunity cost refers to what you have to give up to buy what you want in terms of other goods or services. When economists use the word “cost,” we usually mean opportunity cost.
The answer is c. Election of 1860 Lincoln
I was in a Canadian History Class at the time. Our prof was concerned but he was calm while everyone else was in a great flurry. He did,however, say that Kennedy had ICBMs Khrushchev did not. He turned out to be very accurate in his assessment. Russia could not launch missiles without retaliation, so Khrushchev blinked. He was a pretty tough guy who had survived Leningrad so it was a pretty big blink.
Military Technology is the application of technology for use in warfare. it comprises the kinds of technology that are distinctly Military in nature not civilian in application, usually because they lack useful and legal civilian applications, or are dangerous to use without appropriate Military training.