One of the Biggest Differences Between the Articles of Confederation

One of the biggest differences between the Articles of Confederation and the Constitution was that ______.

A) under the Articles a bicameral legislature existed, whereas under the Constitution a unicameral legislature existed
B) under the Articles a multiple executive existed, whereas under the Constitution a single executive existed
C) under the Articles the states were sovereign, whereas under the Constitution the people were sovereign
D) the Articles could not be amended, but the Constitution could
E) the Articles created a weak federal court system, whereas the Constitution created a strong federal court system