How would the economies of Saudi Arabia and Iraq be affected if people in other countries stopped using as much oil as they do today?

Their economies would not be seriously affected because their economies are very diverse.
Their economies would not be seriously affected because their economies are very diverse.

Their economies would suffer as the price of oil went up and their profits went down.
Their economies would suffer as the price of oil went up and their profits went down.

Their economies would improve as the price of oil rose and jobs in the oil industry were created.
Their economies would improve as the price of oil rose and jobs in the oil industry were created.

Their economies would suffer as other countries bought less of the oil that Saudi Arabia and Iraq produce.

Their economies would suffer as other countries bought less of the oil that Saudi Arabia and Iraq produce. Both countries heavily rely on oil exports as a primary source of revenue, so a decrease in demand for oil would result in a significant decrease in revenue and potential economic turmoil. Both countries would likely need to diversify their economies and decrease their dependency on oil in order to mitigate the impact of such a scenario.