How does a balance of power among nations help keep peace? 1: Its alliances prevent one country from dominating the others
2: It allows a small nation to be stronger than a larger nation
3: It ensures that the biggest nations have the most weapons
4: It ensures that the smallest nations have the most soldiers.​

1.

Explanation:

the first one

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

assuming that you are talking about the one in egypt: hecka oil

explanation: