Choose the answer in which capitalization is used correctly. Death Valley, the lowest point in the United States and part of the Mojave Desert, is located in southern california. Death valley, the lowest point in the United States and part of the Mojave Desert, is located in southern California. Death Valley, the lowest point in the United States and part of the Mojave Desert, is located in Southern California. Death Valley, the lowest point in the United States and part of the Mojave Desert, is located in southern California.