The answer is Navajo code
The United States advocated for the creation of the Kellogg-Briand Pact because they wanted to outlaw war. They hoped that the signatories will ensure that there will be no causes of war and there will be a peaceful relationship among the nations.
The United States don't want to engage in another World War after it has experienced the losses that World War I brought them as a nation.
I believe the best answer is A) Johnson was too lenient on the Confederate leaders.
I hope this helped
A. east of the Mississippi River