Answer:
a. gold coins
Explanation:
Marco Polo was impressed by the paper money, coal burning and gunpowder in China. But, gold coins are not new to him.
<span>people left italy because of persecution, fear, natural disasters, poverty and unemployment. </span>Pull factors<span> made people want to come to the U.S</span><span> for freedom, safety, stability and new opportunities.</span>
Robert Fulton was an amazingly inventive person who has been credited for inventing many devices, although perhaps his most famous invention was the steamship.