Answer:
In late 1800s, in United States, the B. growth of middle class was changing.
Step-by-step explanation:
Though the industrialization was on the verge of prosperity in the late 1800s, 'mass-production' of goods was not yet being done. More people started to get employed and thus the leisure time that the people had earlier decreased considerably.
Though the societies modernized, blacks and minorities were not given the importance they deserved as humans. Because there was a growth in the rate of employment, poor families experienced prosperity and grew to become middle class families.