The answer to your question asked above is the last option or option D
The answer would be East Asia. East Asians
comprise around 1.6 billion people. About 38% of the population of Asia
and 22%, or over one fifth, of world's population lives in East Asia.
After the collapse it become a "democratic" nation so US saw it as less of a enemy. Also, it become a lot weaker so it wasn't as big of a rival or threat to the USA. Allowing it to trade and work together on major projects.
The answer is Melanesian. The Lapita people branched off into two different cultural groups, the Polynesians and Melanesians. Lapita people were a prehistoric Pacific Ocean people. The Lapita people were known to be good in seamanship and navigation. There economy were largely due to agriculture. They domesticate animals, plant crops and trees and fish in water bodies. Although, a few percent is due to trading.