Well the first one, and the fourth one.
Knights were indeed lower than vassals and held less prestige in medieval society. It's not true though, that knights didn't have enough prestige in medieval society. Vassals swore to the king or the ruler of a region, whereas knights often swore to vassals, so they still had people under them, but they were not at the top.
Answer:
THERE ARE 10 REASONS WHY AMERICA'S FIRST CONSTITUTION FAILED
THE STATES DIDNT ACT IMMEDIATELY
THE CENTRAL GOVERNMENT WAS DESIGNED TO BE VERY VERY WEAK
THE ARTICLES CONGRESS ONLY HAD ONE CHAMBER AND EACH STATE HAD ONE VOTE
CONGRESS NEEDED 9 OF 13 STATES TO PASS ANY LAWS
THE DOCUMENT WAS PRATICALLY IMPOSSIBLE TO AMEND
Explanation: