Ms X, a Norwegian Female Age 55, Ms

Ms. X, a Norwegian female age 55, Ms. Y, an African American female, age 55, living in England, and Ms. Z, a Scottish female, age 55 have vast differences between their systolic blood pressure rates by day and night. Based upon research by Ancheta (2014) , these three individuals:

A) Have lower rates of deaths than residents of the U.S.
B) Have a serious cancer problem
C) a and b
D) None of the above