All of the Following Are Proposals for Improving Desalinization Except

Multiple Choice

All of the following are proposals for improving desalinization except one. Chose the one that is not a proposal.

A) ships that carry desalination equipment operating offshore
B) desalination plants operated by solar energy
C) desalination plants using ocean wave energy
D) build desalination plants next to coastal energy plants to use their cooling water
E) let natural evaporation remove the water in large shallow basins