France's leader, Jefferson was worried that he was trying to build an empire in North America Robert Livingston James Monroe Thomas Jefferson Napoleon Bonaparte

Napoleon Bonaparte

Explanation:

France's leader, Jefferson was worried that he was trying to build an empire in North America was "Napoleon Bonaparte"

This is evident when the United States under Jefferson made the purchase of Louisiana from the French. Because United States hold the belief that Napoleon Bonaparte might eventually want to monopolize the Mississippi River and ultimately the Gulf of Mexico.

Similarly, Jefferson at some point while Napoleon Bonaparte was still France's leader declared that "The day that France takes possession of New Orleans…we must marry ourselves to the British fleet and nation."

b. germany and italy

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.