What economic effects did the Columbian Exchange have on Europe? Choose three correct answers. Investors became less wealthy.
Merchants made fewer trade voyages.
Spain gained wealth by trading silver with Asia.
Europe became the center of the first global economy.
Many European nations became wealthy through increased trade.

The picture below shows president richard nixon and the first lady standing before the great wall of china in 1972. they are smiling - as are the chinese with them. when this picture was shown on american television, americans were aware that it was a historic moment. what are two reasons why this moment was important for both china and the united states?