What was one of the main reasons for u. s. economic growth in the early 1950s?
a. continued wartime government controls kept prices of consumer goods low.
b. continued wartime government contracts meant that unemployment was low.
c. wartime surplus of consumer goods gave people something to buy with their savings.
d. wartime shortages inclined people to spend money when consumer goods became available.

a. continued wartime government controls kept prices of consumer goods low.

Explanation:

The economic growth in the early 1950's was the beginning of an era of intense economic expansion in the US and in the capitalist world that lasted for nearly 30 years. The growth experienced by the Western economy is linked to a change in the factors of labor and capital production. The policy of low prices, carried by the government through controls during the war, allowed new consumers to reactivate the economy in a fast way. Also, technological advances, the implementation of economies of scale, and improvements in business organization increased productivity. The increase in the labor supply was due to the natural growth of the population (baby-boom) and the changes in the rate of the active population as a result of the massive incorporation of female labor, due to international population movements and the attraction of workers from agriculture. Not only were quantitative increases in the labor supply observed, but also qualitative increases due to the improvement of the educational system.

On the other hand, the technical progress experienced at this time was linked to the multiplication of raw materials thanks to the manufacture of synthetic fibers and metal alloys, the spectacular development of new machinery and instruments, the advances in the extraction of natural resources and improvements in transportation and communications. This technological revolution was fundamental for mass production, automation, and industrialization of science.

the underground railroad (apocope of the metropolitan railroad) is a system of urban trains located within a city and its metropolitan area. it is characterized for being a massive transport of passengers in the big cities, uniting diverse zones and their environs, with high capacity and frequency and in segregated form to other systems of transport. metropolitan railroads are built underground or on the surface, although most systems use mixed models where sections are combined in both modalities.

1 - as a result, the metro tends to reduce car travel for two reasons: first, due to the greater transfer of users from the car and, second, due to the reduction in the acquisition of cars in homes located in sectors near the stations of the metro.

2 -the metro allows to contribute effectively to the achievement of all the objectives of an urban development policy: it improves the efficiency of the city's economy by reducing travel costs and also generates a higher level of activities in the city center, taking advantage of of the agglomeration economies.

3 -it is a clean means of transport, since it uses renewable energy (usually electricity), taking care of the environment and avoiding excessive pollution.

b) the confederacy had to pay all union war expenses.