Which statement BEST supports where most people live in Southwest Asia?

A) As a result of fertile land, most people live on the Iranian Plateau.

B) As a result of deserts, most people live in the interior regions of countries in Southwest Asia.

C) As a result of the arid climate, most people live in the mountainous areas of Southwest Asia.

D) As a result of water availability, most people live along the rivers and the coastlines of the region.