For What Reason Does the Book Justify Representative Democracy

 For what reason does the book justify representative democracy? 

A)  Deciding wisely on issues is impractical and unlikely, but deciding on leaders is possible. 
B)  Elites are better at making political decisions. 
C)  Representative democracy reserves power to important institutions besides the people. 
D)  The Capitol Building lacks the room for all voters to discuss issues. 
E)  Direct democracy is subject to emotional whims by voters.