The correct answer is number 2. Avoiding conflicts with European nations.
The common goal of the Proclamation of Neutrality(1793), the Embargo Act(1807), and the Monroe Doctrine of 1823 was to avoid conflicts with European nations.
In many moments of history, the United States decided that maintaining a neutral approach was the best decision for the US foreign policy. We can see something like this in the Proclamation of Neutrality(1793), the Embargo Act(1807), and the Monroe Doctrine of 1823. The US tried to keep a distance of the European issues and conflicts in different moments of time, but at the end, for one reason or another, the United States ended up participating in those situations.