The correct answer is D. They used slaves for cheap labor
Step-by-step explanation:
In U.S. history and especially from the 17th to the 19th centuries, there were important differences between the northern and the southern states. Indeed after the creation of the first colonies, the economy of the northern states was mainly based on industrialization, while the economy of the southern states was mainly based on extensive agriculture. Besides this, due to the work labor required in the south, the states of the south used slaves for cheap labor while the states of the north were mainly free states that were concerned with rights and supported the abolition. Considering this, the one that does not describe the northern states is "They used slaves for cheap labor" because this occurred mainly in the Southern states as these states used mainly extensive agriculture to thrive and this supported slavery while the northern states were based on industry.