Tigers are considered an endangered species. The World Wildlife Fund surveyed some conservation landscapes to monitor tiger populations. Some of the population data from the study are shown below. Population W X Y Z Landscape Name Satpuda Maikal (India) Central Sumatra (Indonesia) Greater Manas (India and Bhutan) Amur-Heilong (Russia and China) Number of Tigers 400 187 152 429 Landscape Area (km?) 91 630 48 492 36 399 1 062 500 based on World Wildlife Fund, 2012 47. When the tiger populations are ranked from highest population density to lowest population density, their order is A. W, Y, X, Z B. W, Y, Z, X C. X, Y, W, Z D. Z, X, Y. W