The rundown area where most of the poor people of a city lived was called a what?

A. Slum
B. Tenement
C. Suburb
D. Exurb

Option: Slum.

Explanation:

Slums are the area where most of the poor people of city life. People are poor and live in a miserable condition in a small cluster of houses. Poverty is the cause of increasing slums. The sudden move of rural people to urban in search of employment causes a rush in cities which led to creating a slum area where they can live reasonably without too much spending money.

to extend a country’s power and influence

the communist manifesto is an 1848 political pamphlet by the german near the end of the manifesto, the authors call for a "forcible overthrow of all existing social conditions",  ..