If a population of kangaroos (known as dominant mammal in Australia) was discovered living on island northwest of Wallace's line, which of these would be the most likely explanation? This population distribution: relict from the time when marsupiab mammals had worldwide The population was recently founded by kangaroos that dispersed there from Australia The population was isolated by recent vicariant event: Kangaroos are superior competitors to the mammals from the Oriental biogeographic realm: Wallace's Iine is an inaccurate representation for the faunal break in this particular region