Answer:
A. Expand the railroad lines
Step-by-step explanation:
At the beginning of the 19th century, the population of the United States was fundamentally ignorant of the conditions (labor, sanitary) in which industrial activity was carried out in the factories. In this situation, the progressive movement that found in the Republican Theodore Roosevelt was developed a leader who thought that a president should use federal power to improve the living conditions of his people, to give ordinary man what he called "a fair treatment"
The curious fact is that, while throughout the world progressive sectors championed names linked to the political left, in the United States these sectors have adopted the name of liberals, a name that in other countries is related to sectors that are not currently seen as progressives, which causes the confusion of many people who think that, by the coincidence of names, in the United States there would be no progressivism in the style of other Western countries. In the United States, the English term liberal is equivalent to progressive, and is associated with social liberalism. On the other hand, the promoters of economic liberalism are not called liberals, but libertarians. This is inheritance of the old Anglo-Saxon bipartisanship, which consecrated the liberal term as synonymous with the left, and conservative as synonymous with the right. However, in some other countries similar confusion of terms may occur; For example, in Colombia, the Colombian Liberal Party is a Social Democrat and a member of the Socialist International; in Honduras, the Liberal Party has important sectors of social democratic thought, and in the United Kingdom, the Liberal Democratic Party emerged from the merger of the historic Liberal Party, and the Social Democratic Party split off from Labor and is often seen as center-left.