This is a drawing of an innovation that was introduced in New York City in 1904. 100 points please help

How did this innovation alter urban life?


A It decreased wealth disparity as people had access to the same transportation.

B It relieved overcrowding as most factory workers moved outside of the city.

C It shifted urban demographics as wealthier people were able to live outside of the city.

d It eased pollution as sanitation problems were confined to underground tunnels.