Final answer:
The Second Continental Congress issued the Declaration of Independence, sent the Olive Branch Petition, formed the Continental Army, and elected George Washington as Commander in Chief.
Step-by-step explanation:
The Second Continental Congress made several pivotal decisions that helped shape the future of the American colonies. The correct decisions from the options provided by the congress included the following:
- Issued the Declaration of Independence
- Sent the Olive Branch Petition to King George
- Formed the Continental Army
- Elect George Washington as Commander in Chief
Thomas Jefferson was not elected as president by the Second Continental Congress; he was the principal author of the Declaration of Independence. Also, the congress did not force the New England colonies to join; instead, it managed the collective effort of all thirteen colonies in their struggle for independence.