<span>Norsemen, or Northern men, of Scandanavia also called Vikings. They were superb shipbuilders and sailors and started building settlements, Western Europe was beset by a wave of invasions
The barter system was an old way to exchange goods in place of money. In the Middle Ages, Europeans traveled around the world and exchange crafts and other materials. The barter system has its disadvantages, it was quite difficult to carry goods from one place to another, and the value of the goods was not priced well. Silk Road also played an important role in bringing money in use, small silver coins were brought to use.
The Industrial Revolution was a period of major industrialization and innovation that took place during the late 1700s and early 1800s. The Industrial Revolution began in Great Britain and quickly spread throughout the world.
"D. They formed hate groups to spread terror" and "<span>They refused to build schools for blacks" are both correct. These complications and barriers existed in the South all the way until the Civil Rights movement.</span>