The Intermontane Region Includes Some of the Driest Places in the United

Multiple Choice

The Intermontane region includes some of the driest places in the United States.What is the primary cause of these low rates of precipitation?

A) The region is located on the leeward (eastern) side of a series of mountain ranges
B) The region is located to the west of the Rocky Mountains
C) The lack of groundwater in the area keeps humidity low
D) The region is affected by cold,dry northern air from Canada