During the late 1800s, major improvements to a nationwide system of trade were made with?

During the late 1800s, major improvements to a nationwide system of trade were made with the development of strong transcontinental railroads.

Explanation:

During the late 1800s, business magnates and industrialist entrepreneurs such as Andrew Carnegie and Cornelius Vanderbilt enabled the American society to increase their wealth by leading the growing industries such as steel and constructing major railroad networks. Vanderbilt helped make railroad transportation more efficient by using new technologies and business organization, and the steel production enabled the construction of stronger railroads. Vanderbilt greatly improved the nation's transportation infraestructure and this allowed a more efficient transport of goods across the US. Therefore, goods produced in the west could reach the eastern states rapidly and, in consequence, be sold by trading with other nations.  

the hollywood film industry of 1950 was threatened on several different fronts. television broadcasting was rapidly becoming the dominant entertainment medium in the united states. the paramount anti-trust consent decree requiring separate ownership for production companies and theater chains had gone into effect on 1 january 1950. large numbers of young men and women were marrying, having children, and moving to the suburbs, which affected the viability of downtown first-run movie theaters. foreign revenues were endangered by protectionist tactics including quota systems, high taxes, and blocked funds. finally, the morality and patriotism of hollywood films and filmmakers were under attack from government, religious, and citizens' groups.

explanation: