What factors have allowed Australia to develop into one of the world's leading "upper-right" countries (high global development index)? Select all that apply. Group of answer choices Borders with neighboring threats Geographic isolation High population density Intermittent wars that destroy infrastructure Educated and skilled workforce Abundant mineral wealth Highly developed energy infrastructure Diversified economy Highly restrictive trade policies Various climates suitable for growing different crops Selective immigration policy High housing prices Abundant livestock Importation of most goods