When the U.S. embassy in Iran was invaded and more than 50 Americans were taken hostage, how did the United States respond?

The Senate declared war on Iran and President Carter ordered troops to invade the country.
The United States chose to isolate itself and not get involved in the conflict.
The United States government purchased more oil from Iran hoping to convince them to release the hostages.
President Carter negotiated with Iran to have the hostages released.

The correct answer is: President Carter negotiated with Iran to have the hostages released.

When the U.S. embassy in Iran was invaded and more than 50 Americans were taken hostage in 1979, the United States government chose a diplomatic approach to resolve the situation. Here's how the United States responded:

1. President Carter negotiated: President Jimmy Carter implemented a diplomatic strategy to communicate with the Iranian government, seeking a peaceful resolution to the hostage crisis. He engaged in negotiations to secure the release of the hostages. These negotiations lasted for 444 days and involved various channels and intermediaries.

It is important to note that the other options listed in your question are incorrect:

- The Senate declaring war on Iran and President Carter ordering troops to invade the country did not happen. The United States opted for diplomatic efforts rather than military action.
- The United States did not choose to isolate itself and not get involved in the conflict. The hostage crisis was a pressing international issue that the United States actively engaged with.
- The United States did not purchase more oil from Iran to convince them to release the hostages. Economic sanctions were implemented but not for the purpose of purchasing oil.

Overall, President Carter's negotiation efforts eventually led to the release of the hostages through the signing of the Algiers Accords in January 1981, just moments after President Ronald Reagan's inauguration.