The Great Deserts and Associated Arid Areas of the World $\degree$

The great deserts and associated arid areas of the world mostly lie along the western sides of the continents at about

A) 0 $\degree$ north and south latitude.
B) 15 $\degree$ north and south latitude.
C) 30 $\degree$ north and south latitude.
D) 60 $\degree$ north and south latitude.