Which describes the most accurate reason why oil wealth affects the stability of the Middle East?

Wealthier Middle Eastern countries are able to use their oil profits to fund armies for self-defense.

Profits from the unpredictable oil market can be inconsistent enough to ruin national economies.

Oil is a source of great fortune and global power, making it influential in government and the economy.

Middle Eastern nations with unlimited oil/fuel supplies often engage in long-term military aggressions.