I don't have the entire answer, but I do know that the freedom of the state (as in acceptance towards people of color) and the several gold rushes and general resource deposits in California drew in pioneers, gold panners, and simple citizens looking to settle down in a high income area.
Answer:
The formation of the 54th Massachusetts Regiment was made up of African American soldiers, being one of the first formations of the Union Army to be made up exclusively of black people. Many of them were free men, but others were freed slaves fighting for an end to slavery in the southern states of the country. Its creation occurred after the Emancipation Declaration, through which President Lincoln made the abolition of slavery one of the main objectives of the war, attracting many African-Americans to the cause of the Union.
For the Confederate soldiers, the fact that a regiment of people regarded by them as inferiors faced them in battle meant an affront to their convictions, but also created fear in the face of possible personal revenge, and even in the face of the possibility that their own slaves rebelled and joined this regiment.
The Louisiana Purchase treaty is an important document in the study of Manifest Destiny because it shows the extent to which the United States was claiming land westward. The correct answer is D.