This whole thing is bullshit and it's the fault of every administration PRIOR to Trump...yes, Bush as well.
This mess is not Trump's fault....at all. He has not been in government and was not involved in the decision to pay extortion money to NOKO that they used to further their nuclear program.
You left out the only answer I would pick:
"Seriously re-evaluate our defense system."
In reality thankfully that won't happen. We will knock them out of the sky before they even get halfway there.