"This may be something people may want to consider in the decisions they are making," Lisa McKenzie, senior author of the study, said.
Foreign Minister Javad Zarif gave an interview in New York City, where he is under tight visa restrictions, during a visit to the United Nations.
"Uncertainties remain, the challenge gets harder, but the future's bright, now we've a charter," the OPEC+ poem read.
The president's national security adviser also suggested Iran is still seeking a nuclear arsenal despite its adherence to the 2015 nuclear deal.
Previous reports suggested the main responsibilities of about 1,500 additional U.S. troops would be "defensive in nature."
Iran's top diplomat said his country was not interested in escalation, but Iranians "will defend ourselves" and such an escalation would mean "painful consequences" for both sides.
Iranian Foreign Minister Mohammad Javad Zarif challenged President Donald Trump to "drain the swamp" of Washington war hawks like John Bolton.
"I'm not a military man, but what I can tell you is that we do not fire missiles out of small boats," said Iran's U.N. ambassador Majid Takht Ravanchi.
Houthi rebels in Yemen, backed by Iran, have claimed responsibility for the attack.
"That's what happens when you listen to the mustache," Iranian presidential adviser Hesameddin Ashena tweeted to Trump in an apparent reference to national security adviser John Bolton.
"We'll see what happens with Iran. If they do anything, it will be a big mistake," President Donald Trump warned at a White House press conference..
U.K. Foreign Minister Jeremy Hunt told reporters that "we are very worried about the risk of a conflict happening by accident, with an escalation that is unintended, really on either side."
Iran has claimed innocence as regional tensions rise between Washington, its allies and Tehran.
Iran and Venezuela's shared hostility toward the U.S. is rooted in its attempts at regime change.
"The rest of the world sees perfectly well that Washington's policy is getting increasingly aggressive and reckless," a Russian Foreign Ministry statement said.
The U.S. increased oil consumption last year by around 540,000 barrels a day.
The drills were designed "to protect the territorial waters of our country, maintain lines of communication and promote the flag of the Islamic Republic of Iran."
The U.S. sanctioned the Venezuelan state-owned oil and gas company PDVSA, which is Venezuela's biggest source of revenue.
This is the best shot Venezuela had at democracy for a generation—and the U.S. can't afford to sit this one out.
"Mr. Bernhardt has represented mining and extraction companies, developers, and oil and gas interests," wrote 150 environmental advocacy groups in a letter.
In response to mounting pressure to punish ally Saudi Arabia, President Donald Trump has instead accused the "terrorist nation" of Iran for unrelated acts.