Question

In a modern Democracy:
A.all elected officials serve for a certain number of terms then must retire
B.a high school sophomore and a senior citizen may vote at the polls together
C.a US Senator votes on immigration law on behalf of your mother through indirect ballot
D.all democracies have a two chamber system of representation
E.we, in the US, live in a direct democracy

Answer 1

The correct answer should be A. all elected officials serve for a certain number of terms then must retire.
Let's use the system of elimination: 
B is incorrect because high school sophomores cannot vote yet (legal age for voting in the US is 18, and sophomores are 16)
C is incorrect because this is done through direct ballot
D is incorrect because there are democracies which have more
E is incorrect because a direct democracy doesn't exist anymore - it existed only in ancient Greece