Study the map of regions in Australia and Oceania.
A map titled Regions of Australia and Oceania. Australasia, Polynesia, Melanesia, and Micronesia are color-coded and labeled A, B, C, and D. Australia is in Region B. New Zealand is in Region A. Guam is in Region D. Papua New Guinea is in Region C.
Which region is marked with the letter A?
Polynesia
Australasia
Melanesia
Micronesia