All of the following contributed to the rise of aggressive dictators prior to WWII EXCEPT: Economic depression casued despearte people to look for strong leadership.
The Treaty of Versailles left some countries angry/bitter.
The Roaring 20's economy boosted confidence in democratic systems of government across Europe.
New democracices in Europe were blamed for the economic failures of the Great Depression.

C. The Roaring 20's economy boosted confidence in democratic systems of government across Europe.

Explanation:

The cultural and economic prosperity of the US during the 20s did not affect the rise of fascism and totalitarianism in Europe.

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.