The most accurate response that analyzes the impact of the Iranian Revolution on the politics of Arab countries is:
The Iranian Revolution demonstrated that it was possible to base a government on religion.
This is because the revolution in 1979 established a theocratic regime, which inspired other movements and groups in the region to consider Islamic governance as a viable alternative to secular or Western-style governments. It showcased a successful transition to a government heavily influenced by religious principles, prompting various factions in neighboring Arab countries to rethink their political structures and ideologies.