Which is the best definition of the Columbian Exchange? A. the name of Columbus’s last expedition to North America
B. the transfer of diseases from Native Americans to Europeans
C. the trade routes for goods between North America and Europe
D. the movement of cultures and goods between Eastern and Western Hemispheres

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

Arecent challenge to the european union created by a member state is?

In 1914, alabama produced 1.7 million bales of cotton, but three years later produced only 515,000, bales. meanwhile, in georgia, 5.2 million acres of land was dedicated for cotton production in 1914, but by 1923 there were just 2.6 million acres used for growing cotton. all of this was the result of the work of a tiny insect: the boll weevil. alabama and georgia first felt the effects of the boll weevil at different times. what would account for this difference in timing?