I believe the answer is: Framingham
Framingham study is being done since in order to study hypertension. Currently, the subject of the framingham study has reached its third generation with more than 5000 members. They also study the relation betwen diet , medication , and excercise on heart diseases.
The answer is C because Kay powers sum like that
A naturalized citizen is a citizen who was not born a citizen,but became a citizen later. One becomes a citizen by being born on American soil or by having American parents - so those people can't usually be naturalized.
The correct answer is:
c. Anyone born outside the United States to parents who aren't citizens of the United States