The Colorado River Still Has Water After It Leaves the Desert

The Colorado River still has water after it leaves the desert southwest region and enters the Gulf of California because______ .

A) the desert is dry because it saps water out of the Colorado River, but that water ends up precipitating downstream the desert
B) the river began outside the desert, which is normally the only way streams that leave the desert will still have water in them
C) the river began in the desert and desert streams usually still have water in them when they leave
D) desert streams tend to increase in size as they pass through a desert