Deserts Typically Occur in a Band Around 30 Degrees North

Deserts typically occur in a band around 30 degrees north and south latitude because

A) descending air masses originating from the tropics tend to be dry.
B) trade winds have little moisture.
C) moisture-laden air is heavier than dry air and is not carried to these latitudes.
D) ascending air from these regions tends to be moist, removing available water and creating a desert.
E) these locations get the most intense solar radiation of any location on Earth.