The articles of confederation were way to week.Although it would have been a little simpler,the US needed a strong government.The states had too much power.The constitution was made for all the present states and future states to follow.If would give a larger body of government power along with state government.The constitution keeps the states from gaining too much power and causing harm to the country.
I really hope this helped you and good luck!
A) China- Explanation, China is the only country that has a emperor and china is also the only country that has the Prime Minister as the Head of government.
I don't know of any events in Greece at the time, so I think we can reject this answer.
HUngary is correct, except that it was not independent at the time, but part of the Austrian Empire, so it's already included in the question.
Spain had a little unrest, but not a lot.
The best answer is Italy - it had very important events during this time, for example the revolution in Sicily in 1848.
