Studies show that young people with higher-than-average blood pressure and their families have a history of high blood pressure are more likely than others to develop a severe form of the condition.
A.and their families have a history of high blood pressure
B.whose families have a history of high blood pressure
C.and a history of high blood pressure runs in the family
D.whose families have a history of high blood pressure running in them
E.with a history of high blood pressure running in their family
