Sierra has a lot of questions durning class but she's too shy to ask them in front of her peers if sierra wants to find out more information about something presented in class what's should she do

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