Iran you just confessed that the sanctions already in place are working very well. If they were not working, you would not threaten to stop oil exports citing a Plan B as a cushion. More sanctions ( Iran ) would be devastating to your economy. Halting your Oil Exports may bring catastrophic results. Think with a clear mind and not with a heart full with grudges and revenge. Remember the Iranian children and pregnant mothers. They are the future of Iran. In this case, abiding by the International Laws is a sign of strength. Allowing your beautiful Country to detiorate and your citizens to suffer is a sign of weakness. Be aware, the world will continue without your present. GOD Bless.