Which of the following explain why the founders of the Constitution decided upon a bicameral rather than a unicameral legislature?

I. It balanced the interests of low- and high-population states by giving smaller states a voice in the Senate that their low populations would not grant them in the House of Representatives.
II. Either legislature could block legislation approved by the other, thereby strengthening the American system of checks and balances.
III. The House of Representatives was granted responsibility for domestic affairs while the Senate specialized in America's relations with the rest of the world.
a. I only
b. I and II only
c. II and III only
d. III only
e. I, II, and III

Answer: b. I and II only