Option A, turkey is the right answer.
A long-term benefit of the Columbian Exchange was the improvement in the diet of the people of Europe. Not only the Europeans were benefited by the Columbus exchange but also the Native Americans benefited greatly from the technology that the Europeans brought over to the New World. Native Americans shared Turkeys, Alpacas and other items with Europeans which signifies a mutual relationship.<u> Colonial Exchange plays a substantial part in the history of America. </u>
