This period was a time of great political unrest, which divided europe into eastern and western sections. cold war imperialist middle ages yalta conference

Option: Cold War

Explanation:

There began political unrest in Europe toward the end of the World War in 1947, which divided Europe into two-part as an Eastern and Western section, the period was known as the Cold War. The Cold War was a conflict between the ideologies, geopolitical, economic struggle, nuclear power between the United States and USSR who wanted to gain superpower in the world.

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.