The white abolitionist movement in the North was led by social reformers, especially William Lloyd Garrison, founder of the American Anti-Slavery Society, and writers such as John Greenleaf Whittier and Harriet Beecher Stowe.
The Columbian Exchange lead to an increase in the demand for skilled labor in Europe, because D) an abundance of raw materials from the new world needed to be made into finished goods. Many raw materials and new products were brought over to Europe from the Americas which needed to be made into finished products.