Answer:
Some slaves bought their own freedom from their owners, but this process became more and more rare as the 1800s progressed. Many slaves became free through manumission, the voluntary emancipation of a slave by a slaveowner.
Explanation:
Labor unions were formed to push for "a. better working conditions" "d. eight-hour workdays" and "<span>f. demand for higher wages" since the Industrial Revolution had led to great mistreatment of workers. </span>
