Which reasons explain the failure of the League of Nations? Select two options. 1. The League of Nations was not authorized by the Treaty of Versailles.
2. President Wilson did not support the creation of the League of Nations.
3. The League of Nations was created by the unpopular Treaty of Versailles.
4. The United States was unable to convince any other nations to join the league.
5. The US Senate did not allow the US to become involved in the League of Nations.

explanation:

there are two statements that are incorrect.

1. the marshall plan was a lend lease program. it was an economic plan that europe redevelop itself after wwii.

2. einstein didn't really do anything to further the allied cause in building the bomb. he merely sent a letter to fdr telling him (in 1939) that if the united states entered the war, perhaps it would be wise to build the bomb before germany did. i would say this answer is incorrect, but when america entered the war 2 years later, fdr thought it might be a good idea to take einstein's advice.

the 4th choice is definitely so wrong that is likely the single answer of this question