Answer: D) trappers and traders.
Explanation:
Trappers were people who catch animals to get fur. Trappers and fur traders were known as mountain men. They had a lonely and usually dangerous existence, far away from settlements. They embraced Native American traditions and attire as a means to survive. Trappers and fur traders helped develop new settlements across the continent.
The U.S postal service is an example of government monopoly
A government monopoly is a government corporation that is created government to provide a certain good or service and is protected from competition. For instance, the law bars competitors from providing certain services that are offered by the U.S postal services.
I think that it could be the last one
World war 1 marked the first war in which American women were allowed to enlist in the armed forces. While thousands of women did join branches of the army in an official capacity, receiving veterans status and benefits after the war's close, the majority of female involvement was done through voluntary organizations supporting the war effort. Additionally, women made an impact on the war indirectly by filling the workforce, becoming employed in the jobs left behind by male soldiers.
Dred Scott vs. Sanford ruled that Black Americans were not American citizens and did not have the right to sue someone in federal court. It also ruled that Congress lacked the power to ban slavery in the U.S..