Desalination Plants,such as the One Completed in Tampa Bay in 2008,________

Desalination plants,such as the one completed in Tampa Bay in 2008,________.

A) produce enough water for local agricultural crops such as corn
B) are needed to convert seawater into drinking water
C) produce water as inexpensively as groundwater supplies
D) are expensive and not a sustainable source of water,given today's technologies