Many population studies have linked a high-salt diet to high rates of hypertension and shown that in societies where they consume little salt, their blood pressure typically does not rise with age.
(A) shown that in societies where they consume little salt, their
(B) shown that in societies that have consumed little salt, their
(C) shown that in societies where little salt is consumed,
(D) they showed that in societies where little salt is consumed,
(E) they showed that in societies where they consume little salt, their
GMAT Prep
Correct answer choice C
I thought that where could only refer to places. Apparently it also can refer to societies. Are there any other similar nouns to which where can refer? for instance clans.