The closest the world came to war during the cold war was when the soviet union placed missiles on the caribbean island of a. aruba b. puerto rico c. cuba d. saint thomas

The correct answer is - c. Cuba.

When Fidel Castro took over Cuba and made it a communist country, the United States were right to be displeased and scared by that move, especially that the Soviet Union very soon became the closest friend, supporter, and defender of the Caribbean nation.

The Soviet Union was the arch enemy of the United States, and since the tension was so big between the two countries, and they were constantly threatening to each other with nuclear weapons, the Soviet Union decided to set missiles in Cuba. Cuba being so close to the United States, meant that any place can be destroyed without any problem.

The tension at those moments was so big, that the world was just one decision away from another, much more terrifying and devastating World War.

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the correct answer is "c: merchants" and "e. soldiers".

the song dynasty was known as the first government in the world to introduce paper currency. it was also the first chinese government which established a permanent standing navy. finally, the first compass was introduced during this period of government.

all of these innovations heavily affected commerce in a positive way. printed money dynamize commerce within the borders of the empire due to an easier way to quantify value during the trade. the introduction of the compass trade routes to be faster. finally, the introduction of a standing navy regulate trade routes.

regarding military affairs, gunpowder was created during this period. this was a tremendous improvement that was widely utilized by the military in order to innovate in the manufacturing of weapons.