Which 3 continents were involved in the "exchange"

On the first leg of their three-part journey, often called the Triangular Trade, European ships brought manufactured goods, weapons, even liquor to Africa in exchange for slaves; on the second, they transported African men, women, and children to the Americas to serve as slaves

answer; /// i believe its(c) policymakers prioritize the various problems facing the state;

dude you should crop your image so only the question shows. but   can you explain it better