Read this selection from the United States' Constitution. Then answer the question:

"The executive Power shall be vested in a President of the United States of America… Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors… The Electors shall meet in their respective States, and vote by Ballot for two Persons… The Person having the greatest Number of Votes shall be the President… "

Which difference between American and ancient Greek democracy does this passage demonstrate?

A: Unlimited citizenship vs. limited citizenship
B: Indirect democracy vs. direct democracy
C: Secular government vs. religious government
D: Executive branch vs. judicial branch