Hey, There! I believe the correct answer for this would be "B. a drastic decline in the American Indian population" during the westward expansion a number of american Indians were pushed of their land and violently oppressed. Many died from diseases and battles to protect their land, but mainly from disease.
In the 1900s, the National American Association for Women's suffrage prepared legislative amendments to the U.S. Constitution. This was their greatest advance towards their goal.
In the eastern part of the confederacy, the Army of the Protomac met with mixed success. The Union Army failed to capture Richmond and won at Antietam only because the Confederates withdrew from the field first. In the western part of the Confederacy, the Army of the West won the Battle of Shiloh, and the Union navy captured New Orleans and Memphis.
