The correct answer is B) It showed that the national government was too weak and the states too strong.
Shays' Rebellion exposed the weakness of the AOC in that it showed that the national government was too weak and the states too strong.
The Articles of Confederation was the first type of Constitution in the United States. Under the Articles of Confederation, the states remained sovereign, while the central government was weak. It was the states the ones who could collect money through taxation. The central government couldn't. So when the federal government needed money it had to ask for it from the states.
So during Shay's rebellion in Massachusetts, the federal government could not respond because it had no power to form an army. A local militia in Massachusetts tried to confront the rebellion unsuccessfully.