I believe the answer is education.
Iraq
Western Asia situated within the Tigris–Euphrates river system, in modern days roughly corresponding to most of Iraq. It also includes parts of Kuwait Saudi Arabia and Syria. Mesopotamia was dominated by the Sumerians and the Akkadians. Mesopotamia is also the site of the earliest developments of the Neolithic Revolution
I believe the answer is C
A.) all of the others are true, the crime rate actually went up due to bootleggers and speak easies and others who illegal made and sold alcohol