Read the passage below and answer the question Columbus and his crew did not voyage alone. They were accompanied by a menagerie of insects, plants, mammals, and microorganisms. European expeditions brought cattle, sheep, and horses, along with crops like sugarcane (originally from New Guinea), wheat (from the Middle East), bananas (from Africa), and coffee (also from Africa) . . . "

Which of the following processes is Mann describing
A-The Columbian Exchange
B-The transatlantic slave trade
C-The Protestant Reformation
D-The Little Ice Age