Question

In the Iran–Contra Affair, why were weapons sold to Iran, which was designated a state sponsor of terrorism in 1984? Check all that apply.
to support moderate factions in the Iranian government
to undermine communist influence in Iran
to help gain the release of U.S. hostages in the Middle East
to support Iran in the Iran–Iraq War
to try to gain influence in Iran

Answer 1

I believe the answer is: 
to support moderate factions in the Iranian government 
to undermine communist influence in Iran 
to help gain the release of U.S. hostages in the Middle East 
to support Iran in the Iran–Iraq War 
to try to gain influence in Iran

In the iran-contra affair, united states government directly influence the Iranian government in order to establish our national interest.
At that time, the united states government provide a couple iranian rebel groups with millitary supply so the groups that oppose our national interest wouldn't get into power.