Answer:
Disease was common in her neighborhood.
Step-by-step explanation:
Tenements were overcrowded and dangerous. Because there were so many people living in such a compact space, disease spread easily. A is wrong because there were more jobs in factories in major cities. B is wrong because women were allowed to work in factories. They just weren't hired as often for some industries. D is wrong because tenements were stuffed with people and kept accepting more people, which is why they were so dangerous.