You don't need advice to answer this question, you need facts. Check your local news websites and dig into the past and history of America's involvement with world affairs. Who did we assist during conflicts, and why? Did we act honorably in every case, or dishonorably, or did different administrations make different choices based on different circumstances? Who is ultimately responsible for America's involvement in current world affairs, and are we doing more good than harm, or vice versa? Which sources of fact do you trust, and why?
Take all these things into account (and many, many more) and decide based on your own opinion which of the three choices represents your own opinion.
(For what it's worth: I probably agree with choice #1 the most, but I also think we need to be a nation of the world, not isolationists; the trick is deciding which issues to directly involve ourselves with, and why, and when.)