What was the effect of carter’s attempts to free the hostages in iran? the hostages were returned to the united states immediately. the united states increased its purchase of iranian oil. all of carter’s attempts failed. the sandinistas were overthrown.

The correct answer is C. All the Carter's attempts failed.

When Carter's term ended is when hostages were being released.

The first attempt was to release the hostage which involved christian Bourget and Hector villalon.

He also tried the attempt by wearing glasses, false mustache, and a wig.

Another attempt occurred when carter was called to publicly promise that he will not impose additional sanctions on Iran.

All the Carter's attempts failed

a.

congress passed laws allowing for free passage between states.