Answer:
D). the development of transportation and communication systems.
Explanation:
'Industrialization' in the United States was the product of several factors including a higher rate of immigration, decreased farm product prices, advancements in technology, development of transportation, as well as, communication systems, etc. The enhanced transportation through railroads and steamships along with expanded communication through telegraphs promoted the rapid growth of industries in the city. It further attracted the laborers to move to urban areas which increased the workforce significantly. Thus, <u>option D</u> is the correct answer.
Newspapers ,radios and television
C.to limit the powers of the central government by establishing reserved powers for states and individuals
Answer:
<em>Class </em>mobility.
Explanation:
<u>Class mobility </u>is a type of social mobility when representatives of a lower-class move to the higher class. It can occur as a result of changes in both classes.
In the given example it occurs both because of the fact that families in the higher class have fewer children and because some offsprings from a lower-class families are hardworking. The tendency that higher-class couples tend to have fewer children leads to the more available spaces in the entry-level labor force, which in turn creates more real opportunities for children from lower-class families. This in is itself becomes an extra motivator to work harder.