Answer: C. Iranian student demonstrators had taken embassy staff as hostages .
Step-by-step explanation:
Iranian students who were part of/ supported the Iranian Revolution, took over the American embassy in Tehran in 1979 and took the embassy staff hostage.
The hostage crisis lasted for 444 days as the United States tried to negotiate their release, even initiating and then aborting military actions at some point. The Revolution was about how Iran had become too westernized to most Muslims in the country and they blamed the US for this the most which is why their embassy was specifically targeted.