Quite a loaded question (a-tier).

Counter-question/game:

Hypothetically, imagine that you become president of US today, inheriting current situation. What would you do regarding Iran situation?

What is the correct action now in current situation?

Spoiler: I think there is no “correct” solution, somebody will be hurt in the end despite best wishes.

Note: Lower supply of oil and fertiliser affects poorer countries more than the rich ones (possibility of famine in Africa). Current Iran government just killed their own civilians a month ago in thousands to end protests; and repressions will likely repeat as protests are likely to repeat. (Irans populace seem to be quite educated and want some reforms) Ground invasion of Iran would cost a lot of lives - civilian casualties always exist.

But honestly, what would you choose to do?