Could someone please check my History questions? Any help will be greatly appreciated! My answers are under the question...

1) Which characteristic is most commonly associated with the westward expansion of the United States?
A) Industrialism
B) Mercantilism
C) Individualism
D) reformism
Answer~C
2) The Louisiana Purchase of 1803
A) Was a major cause of the Spanish-American War.
B) Pushed the Spanish below the Rio Grande in North America.
C) Resulted in increased conflict between the U.S. and France.
D) Almost doubled the area of the U.S. and gave it control of the Mississippi
Answer~D
3) Which of these would have been MOST likely to take the Oregon Trail?
A) Native Americans migrating from the east
B) Americans trying to settle on the west coast
C) People riding on the Transcontinental Railroads
D) Escaped slaves trying to reach freedom in the North
Answer~D
4) The policy of the US government toward the Indians in the period immediately prior to the Civil War was to
A) Drive them out of the country and into Canada.
B) Move the Indian population on to reservations.
C) Grant citizenship and voting rights to Indians.
D) Require the education of Indian children in public schools.
Answer~A
5) Cattle ranching and mining were instrumental in the nineteenth century in getting more people to settle
A) The American west.
B) The American south.
C) The American northeast.
D) The American northwest.
Answer~A
6) During the 1800, what was frequently cited as a justification for U.S. expansionist policies in clashes with other nations?
A) Bill of Rights
B) Social Contract
C) Manifest Destiny
D) Gospel of Wealth
Answer~C
7) In the early 1800s, the Mississippi River was important to the United States because it
A) Served as a major highway for trade
B) Led to wars between Great Britain and Spain
C) Divided the Indian territories from the United States
D) Served as a border between the United States and Mexico
Answer~D
8) The Mexican-American war began when
A) The US annexed Texas.
B) Mexico expelled an American diplomat.
C) Taylor's forces of Texans crossed the Rio Grande into Mexico.
D) American and Mexican forces clashed over disputed border territory in southern Texas.
Answer~D
9) Which statement best explains the increase in sectionalism between 1820 and 1850?
A) Westward expansion created a heated debate over the nation’s policy concerning American Indians.
B) Westward expansion caused a recurring debate over the expansion of slavery into the new territories.
C) Westward expansion during the period occurred faster across the northern plains than the southern river deltas.
D) Westward expansion created a need for government spending to improve transportation.
Answer~B

10) What was a political outcome of the Mexican-American War?
A. Santa Anna was re-elected the president of Mexico.
B. James Polk resigned after the unlawful invasion of Mexican territory.
C. The United States gained the Louisiana Territory.
D. The Rio Grande was established as the American border with Mexico.
Answer~D

Thank you for any help that you can give!