Marie's Family Was Part of the First Group of Immigrants

Marie's family was part of the first group of immigrants who moved to the United States in the 19?? century.Marie lost her grandfather to tuberculosis back then.Which of the following is likely to be a reason for this if her grandfather's lifestyle was typical of those immigrants living in tenements?

A) Her grandfather, like other immigrants, carried infections from his place of origin.
B) Her grandfather is likely to have been a wealthy man who spent his days smoking and drinking.
C) Her grandfather is likely to have lived in a room with no windows or ventilation.
D) Her grandfather is likely to have been a farmer who had to work hard on the fields.