Angry revolutionaries invaded the us embassy in 1978 and took 52 Americans hostage after A)the Cold War ended b) Nixon was impeached c( president cater allowed the shah of Iran to enter the us for medical treatment c) camp David accords
The cold war ended. Nixon was not impeached but resigned before he could get impeached. By process of elimination it is c or d. I am not 100% sure. Hope this helps.