It Is Well Documented That Black Patients Who Come to Hospitals

It is well documented that black patients who come to hospitals with a heart attack are less likely to get certain treatments,such as bypass surgery.What explanation has been proposed to explain the disparity?

A) that geography is a strong determinant of racial disparities in healthcare
B) that black patients are treated in a larger number of hospitals than whites
C) that there is a universal nonwhite health disadvantage
D) that blacks are healthier than whites to begin with