14.D Lincoln taught himself how to practice law while serving in the Illinois state legislature.
He read his lesson from Blackstone's Commentaries and managed to pass the test to obtain the liscense that make it legal for him to practice laws by the age of 25. Even sicne his early involvement in the law, he always been known as those who is brave enough to challenge large corporations and protect the poor.
15.A military commanders in the Mexican-American War.
Zachary taylor at that time was stationed to battle against the army that led by General Mariano Arista. The battles later knnown as the battles of Palo Alto and Resaca de la Palma . Windfield scott on the other hand was appointed to command a group of volunteers that never had war experience before.
16.B conflict between the ideas of federalism and sectionalism.
At that time, the supporter of federalism believe that the central government should had more power over the state in order to make laws and taxation process become easier. Supporters of sectionalism on the other hand believe that the states should have more power to prevent the federal government from violating their rights.
17.B became US citizens and added to the area’s population.
At that time, those people already had some sort of attachment to united states (whether it's working relationships with american business or married to american people), They see changing citizens ships as a hassle and decided to become US citizens instead.
18.The Missouri Compromise
In the missouri compromise, the northerners agree to let misosuri become a slave state as long as maine was freed to become a free state. The kansas-Nebraska Act repealed this compromise and this caused anger among the supporters of anti-slavery movement toward the democratic party.
19.D Santa Anna was quickly defeated at the Alamo.
This defeat happened during the battle of San Jaacinto in 1836. Santa anna later on captured and held for three weeks period by The Texan army. He eventually freed to get back to Mexico with the requirement that he had to sign a peace treaty that guarantee that he will bring the mexican army out of the Texan territory.
20.B The area was part of the Louisiana Purchase.
In the past, the area of Kansas and Nebraska were colonized and belong to the French Empire. in the Louisiana purchases, united states made an agreement with France to trade a large area that conquered by the France in exchange for 50 Million Franc. This area later on separated into several territories including Kansas and Nebraska.
21.C Texas was taken over by Mexico and became part of that country.
Since both mexico and united states realize that this territories had large number of natural resources that would benefit them, none of them want to made a compromise to separate the territory. This event led to the the Mexican-American War that lasted for around one and a half year.