Which of the following is NOT among the solutions to the lack of sewage water treatment pl

Which of the following is NOT among the solutions to the lack of sewage water treatment plants？

A．Cooperation with other organizations.

B．Cooperation with the World Bank.

C．Two projects about treatment plants for sewage waters in Vlore and Pogradec.

D．To control the waste water discharged.

请帮忙给出正确答案和分析，谢谢！