How are the Marshall Islands not on this list? They average 6 feet above sea level, and are one of the 4 only all-atoll nations in the world (along with Kiribati, Maldives, and Tuvalu, all of which are on the list).
PS -- I wouldn't use the Huffington Post as an authority on anything, let alone which countries are actually most at risk by sea level rise.
A good idea for a quiz but I think that you need to state your criteria for being most at risk. Population displacement? How much sea level rise required to submerge the entire country? Or half of it? Economic effects?
PS -- I wouldn't use the Huffington Post as an authority on anything, let alone which countries are actually most at risk by sea level rise.