As a Result of Overcrowding, Sanitation, and Ventilation Problems in Tenements

As a result of overcrowding, sanitation, and ventilation problems in tenements:

A) the mortality rate among the urban poor was much higher than the general population
B) the urban poor often escaped the cities to live in suburbs
C) the high mortality rate was the same for all urban residents regardless of class
D) immigration declined in the late nineteenth century
E) tenements were outlawed in most American cities