Which of the Following Statements About Legislative Structures Is Accurate

Which of the following statements about legislative structures is accurate?

A) Upper houses of bicameral systems are almost always elected indirectly.
B) In bicameral systems, lower houses typically amend or veto legislation originating in the upper house.
C) Larger countries are more likely to have unicameral systems.
D) The majority of liberal democracies have bicameral systems.
E) In the evolution of bicameral systems, lower houses were usually retained as a check on upper houses.