Answer:
A. Increased mechanization has reduced the need for labor.
Step-by-step explanation:
Before 1900 more Americans were engaged in farming and about 90 percent of the population are engage in farming. The farming was mainly for subsistence purpose to carter for the family. As the population increases more lands were used for farming .
During the 20th centuries industrialization and urbanization contributed to the progressive decrease in the number of individual engage in agriculture . This period the agriculture profession progressively became commercialized . Advances were made in the irrigation method. Gas geared tractor were engaged , commercial fertilizers rapidly increased in most farms . The transportation method improved also and this encourage commercialization farming in perishable goods.
The rural farmers and herders left their farms to seek job as the profession became more commercialize .
Generally, the increased mechanization reduces job as machine takes the place of humans labor.