Take off D; the North had won some battles up to that point. Rip off A; the South would never let go of slavery. Take off B, since the Union had some wins already. You can now clearly see where the answer is.
Combative religions struggle is the cause
He was an unpopular ruler because he and his queen Marie
Antionette drained the country financially with their extravagant parties as
well as their own personal expenses.
Apart from that Louis was an indecisive and weak king who paid no
attention to the plight of the people until they rose in revolt which later led
to his arrest and execution.
The correct answer is it lacked a bill of rights for the people.
This fight for a bill of rights for the people was lead by a group known as the Anti-federalists. The Anti-federalists feared that the new constitution did not guarantee a certain set of rights to citizens. This groups fear was that without this list of rights, the central (aka federal) government may become tyrannical and take away rights from citizens. This fear was rooted in America's experience as colonists under the control of Great Britain.
This is why the US Constitution ended up with a bill of rights, as Anti-federalists refused to agree to it until one was implemented.