What did the united states of america do in retaliation against iran? they sent more troops to the area. they detained iranian refugees. they froze all iranian assets. they boycotted oil from the region.

The correct answer should be
They froze all Iranian assets

They also introduced sanctions and put an embargo on all trade with Iran. They didn't boycott oil since nobody would do that, and they didn't send troops out of fear of what would happen to those people. No detaining of Iranians occurred either because it would be counter productive.