The correct statements are # 2, 3, and 4.
The Second Continental Congress started in May of 1775. One of the biggest issues this Congress had to address was the organization of military forces against the British. Even though the revolution already started, the colonists were extremely unorganized. This Congress creates a coordinated colonial army and nominate George Washington to be the commander in chief of the army. Along with this, the Second Continental Congress approves of the Declaration of Independence, which symbolizes an official break away from British control.