The Region of the U $\circ$ N Latitude) $\circ$ N Latitude)

The region of the U.S.that uses the most water for irrigation

A) The northeastern states (east of the Mississippi River and north of the Ohio River) .
B) The southeastern states (east of the Mississippi River and south of the Ohio River) .
C) The southwestern states including southern California (west of the Mississippi River and south of 40 ^$\circ$ N latitude) .
D) The northwestern states (west of the Mississippi River and north of 40 ^$\circ$ N latitude) .