The correct option is "They wanted to end the practice of slavery and free enslaved workers."
Abolitionism is a doctrine that defends the annulment of laws, precepts or customs that are considered as offensive to ethical and moral principles. The term was applied mainly to the current that advocated the abolition of slavery. It has total relation with the eighteenth-nineteenth century liberalism, although abolitionists had already emerged in previous centuries, such as the religious Francisco José de Jaca and Epifanio de Moirans, among others.
