Why Was Life Expectancy Lower for Blacks and Other Racial

Why was life expectancy lower for blacks and other racial minorities in the early 1900s?

A) Race riots targeted blacks and other racial minorities, violently affecting their life expectancy.
B) They made up the bulk of factory laborers whose jobs were dangerous and therefore life-threatening.
C) They suffered more the dehumanizing effects of assembly-line production.
D) They were excluded from the census, so the statistics are inaccurate.
E) In general, they were poorer, endured worse living conditions, and had less access to health care.