Examine the evidence--a thesis should be written after looking at the evidence and determining how an argument can be constructed using the evidence provided.
A thesis should contain an answer to the question or prompt and then 2-3 reasons why (these are the claims of the thesis). The thesis is then supported or proven with evidence.
The correct answer is C. The battle of New Orleans enabled Americans to win generous terms in the treaty of Ghent.
The Battle of New Orleans was important because it was the last big battle of the War of 1812. American forced repelled the British army and won a decisive victory. This gave the US a good position during the Treaty sign and Britain had to lose some terms.
The Truman doctrine and NATO were United States responses to the communist threat after WWII.