Answer: Reagan Administration; Iran; Contra rebels
Step-by-step explanation:
You included no options so the above is my best answer.
Reagan administration brokered the deal of sending US arms to Iran in exchange for money. The United States' commitment to stopping the spread of communism led to its support of the Contra rebels, using money from the arms deal.
The Iran - Contra affair happened during the presidency of Ronald Reagan and involved the sale of weapons to Iran as a method of hostage negotiation. Some of the proceeds of these sales were then used to support the Contra rebels of Nicaragua who were fighting against their Socialist / Communist government.
The reason they needed to use the funds from the sale of the weapons was because Congress had prohibited support for the Contras and the administration was trying to get around this.