Constantine allowed Christianity to become a religion. Other emperors made Christianity the main religion
The reason that Columbus sailed the sea was.
<span>B. He wanted to prove that the world was round</span>
Answer:
Steam-powered trains.
Explanation: Railroads provided the most dramatic transportation growth during the 1800s. They facilitated the movement of people, goods, and information, decreased shipping costs and time, and strengthened the links between the Old Northwest and the East.
