Answer:
Southerners approved the Dred Scott decision believing Congress had no right to prohibit slavery in the territories. Later, in 1868, the Fourteenth Amendment overturned the Dred Scott decision by granting citizenship to all those born in the United States, regardless of color.
Some Americans thought that making California a part of the US would strengthen the security of the nation because there was going to be fewer war threats by adding more territory.
Explanation
They believed that it would protect them more from war threats because California provided a coastline to protect the country, which added more territory. Having the control of it, they could build a defense against other countries who would want to invade from the west side.
In addition, California's natural resources such as silver, gold, and fertile soil were very important for the nation, which was in a growing process.
no it is not a reliable source so true
Huge decline in poverty and crime is not a characteristic of the cities in 1800.
<u>Explanation</u>:
During 1800, the cities in United States face increase in poverty and crime. Immigrants came to US due crop failure, land and job shortages, rising taxes and scarcity.
Crop lien system is the biggest problem faced by the farmers in the year of 1800. Farm aid was not formed to solve the problems of farmer.
Immigrants in America were paid low at their new jobs, this lead them to live in poverty. Poverty made individuals to commit theft, robbery and other violent acts.