What role did political machines serve in cities?
a.) ensuring public harmony and safety
b.) educating and serving the public good
c.) providing honest voting and experienced public servants
d.) alleviating racism and ethnic prejudice
e.) satisfying voter needs and making the bosses wealthy

The role that political machines serve in cities was to satisfy voter needs and making the bosses wealthy.

A political machine is a political organization in which an authoritative boss or small group commands the support of a corps of supporters and businesses (usually campaign workers), who receive rewards for their efforts.

The correct answer between all the choices given is the last choice or letter E. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.