Answer:
American hostages being held in Iran, is the correct answer.
Step-by-step explanation:
The secret arms deal in which US traded missiles and arms with the terrorists in Lebanon who were loyal to Iran is known as Iran-Contra affair. This deal was controversial as the funds from the arms deal was used for supporting civil war deal in Nicaragua. It was a political scandal which affected the presidency of Ronald Reagan. The secret weapon transaction was prohibited as per the public policy of the government.
When the Sandinista movement overthrew Anastasio Somoza, Reagen thought that the left wing groups of Nicaragua could spark a movement throughout the region so he started providing aid to the governments of central american countries in fight against Guerrillas. The money was paid to the government was gained by selling antitank and antiaircraft missiles to Iran, it was against its policy of not helping Iran in its fight against Iran.