The reason for the rise of slavery in the American Colonies

Throughout the 17th century, European settlers in North America turned to enslaved Africans as a cheaper, more plentiful labor source than indentured servants, who were mostly poor Europeans.

These seven factors led to the development of the slave trade:

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;

lincoln won 212 electoral votes to mcclellan's 21 votes, and lincoln beat mcclellan. is the main reason lincoln won in 1864.