It seems that you have missed the given choices of the question above which are the following: A. Industrial pollution drove people out of the city? B. The large number of returning veterans needed homes. C. Booming industry resulted in more wealthy people who could afford homes. D. Military bases closed after the war, creating more space in which to build single-family homes. Based on the given choices, the correct answer would be option C. BOOMING INDUSTRY RESULTED IN MORE WEALTHY PEOPLE WHO COULD AFFORD HOMES.