The Chinese made many discoveries and inventions between about 200 C. E. and 1400 C. E. What two inventions do you believe have most affected life today, and why?

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