In the 1800s the Great Plains region of the United States was characterized by: Vast expanses of native grasses.
This resulted in an increase in the transformation of
communities due to the influx of new immigrants many of whom were at an age
where they are about to establish their own independence and make their own
mark in their new home.
The South was speaking to Britain and France and was asking for military aid against the North and basically they said "Hey win a strategic battle on Northern land and we will help you." Well after the South didnt win the battle because in all terms the Battle of Antietam was more a draw then a loss for either side but because it wasnt an outright victory both the British and French retracted their offer of aid.
The answer is D because Texas was a slave state and most of the states in the US weren’t and everyone knew that once Texas annexed into the US they would try having a slave state but the US would end up saying no slaves in the end.