Answer:
Jimmy Carter was the 39th President of USA,from 1977 to 1981. During his time despite of many achievement,he had also faced some serious problems.From the given options on the question, three of them are given below.
*Iran Hostage Crisis= During his time of Presidency, Iran hostage crisis was on of biggest international threat faced by US. Iran held the hostage for the longest time in the history.
*Soviet invasion of Afghanistan= In 1979, USSR invaded Afghanistan. Jimmy Carter asked Soviet Union to withdraw army fro Afghanistan. But Soviet union did not withdraw and Carter boycott the Olympic 1980.
*The end of Detente= By boycotting the Summer Olympic 1980, US president Jimmy Carter ended Detente. Ronald Reagan used this agenda against Jimmy Carter in the election.
Explanation: