Direct democracy was not practical in the Roman Republic
due to its:

The Roman Republic was not an effective form of democracy because it was not a democracy. We tend to think of government nowadays as fitting into one of two major categories - democracies and dictatorships The only stable type of government, per Aristotle, was one that would combine all three.

Explanation:

Hope this helps!

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.

what are the choices btw if it was me id say the lack of money to continue with education