The Atlantic Ocean. Its the ocean that connects North and South America to Europe. Most early explorers came from Europe and "discovered" the Americas. The slave trade as well as spice trade used the Atlantic ocean because it's the most direct way from most of Europe.
A voter would like to use an evidence t determine whether an advertisement promoting a presidential candidate is credible. It is best to to look for the candidate's official biography or website that a voter can learn something about him or her.
Answer:
Cheap, easy labor, they did not have to do it (had slaves), good land, supply and demand.
Explanation: