The second continental congress was mainly about managing the war effort and driving the nation towards independence. so its the last one and maybe the second to last one.
Naval warfare.
Land warfare.
Artillery.
Chemical warfare.
Mobile warfare.
Aerial warfare
1)Germans sinking US merchant ships taking supplies to England
2)Japan's unreasonable demands on the United States (re- instating oil sales and dropping support of the Philipeenes and China)
3)German submarines beginning to shoot at US war ships
4)England and France are typically our allies so we were going to enter the war eventually anyway
5)Pearl Harbor was obviously why we entered the war.
Number 1 is the correct answer