In 2015, what percentage of united states exports went to countries that were part of free-trade agreements? 9% 47% 59% 91%

What is the columbian exchange? o a. the changes that resulted from europeans settling in the new world b. the relationships that columbus and his men had with the natives they met o c. the ships that columbus bought with money from the king and queen of spain o d. the increase in the number of native american towns in the new world