The answer to this statement is B
The sections of the Transcontinental Railroad joined together in Utah at a place called Promontory Point in 1869 where a famous photograph was taken of the two construction crew (minus the Asian workers who were forbidden from being in the photo) meeting and uniting the rail with a Golden Spike.
The answer will be the second one
Answer: Mutually Assured Destruction - a military strategy put in place to help prevent nuclear warfare.
Explanation: Mutually Assured Destruction, also known as MAD, is a doctrine of military strategy and national security policy in which a full-scale use of weapons by two or more opposing sides would cause the complete annihilation of both the attacker and the defender. It shaped the nuclear arms race in a drastic way, as it helped to remind both parties that neither side could expect to survive a full-scale nuclear exchange as a functioning state.
