Was a drawback of the columbian exchange?
a.
it led to the spread of diseases in the americas, killing thousands of native americans.
b.
it led to the loss of funding for future explorations because the westward route to asia was not found.
c. it led to the destruction of the traditional economy and barter system of native americans.
d.
it led to a rivalry between england, spain, and france in their race to claim american land.