Henry Ford was the first entrepreneur to implement assembly line
production. There is some discussion as to whether it was actually Ford
himself that truly came up with the idea of bringing the assembly line
into the factory, but it cannot be argued that never before had it been
done with quite that level of success.
The answer to your question is:
C. Were dirty, crowded, and unhealthy.
An eminent result of the 1812 war was the American realization that they could fight and survive a war with European power.
The War of 1812 or otherwise called the Second War of Independence" was the motivation behind the Treaty of Ghent. The arrangement was between the United States and United Kingdom marked on December 24, 1814. Among its conditions were Americans gaining a lot of area. At this treaty, the prewar boundary between the United States and Canada was re-established. The agreement came about into peace connection between the two nations with prewar regions maintained.
Emerson gradually moved away from the religious and social beliefs of his contemporaries, formulating and expressing the philosophy of transcendentalism in his 1836 essay "Nature". Following this work, he gave a speech entitled "The American Scholar" in 1837, which Oliver Wendell Holmes Sr. considered to be America's "intellectual Declaration of Independence."