I believe the answer is B
Irredentism
"Irredentism is any political or popular movement that seeks to claim/reclaim and occupy a land that the movement's members consider to be a "lost" territory from their nation's past. Wikipedia"
The answer is approval of conventions in three-fourths of the states.
The Pahlavi and the Ayatollah Khomeini regimes were diametrically opposed. The Pahlavi dynasty ruled Iran from 1925 to 1979. The Pahlavi's were closely associated with the West and ruled in an autocratic matter. This was especially true during the Cold War. Thoroughly western in orientation, women enjoyed significant freedoms in terms of their mobility in public life. The Shah's repression of dissidents led to dissatisfaction among students and the religious right. The last Shah of Iran was forced to resign and leave the country. The Khomeni government represented the ascendancy of the religious rights. Iran became a theocracy and women were increasingly relegated to the margins. They were forced to adhere to religious doctrine, and wear the hijab (Islamic head covering)
