The correct answer is A) general scarcity.
The most pressing challenge facing the Middle East in terms of its water supply is general scarcity.
The Middle East is a desertic region. Places like Afghanistan. Syria, Iran or Iraq are mostly Deserts and is not easy to find fresh water for human consumption. So permanently people in the Middle East live a general scarcity of the vital liquid. Some governments had built dams but this has created more scarcity in other countries, generating many political problems in the region.
The other options of the question were B) pollution from farming. C) pollution from industry. D) bacterial contamination.
