Only 1, 000 to 2, 000 species of fruit flies exist worldwide. Nowhere in the world are fruit flies more taxonomically diverse than in the Hawaiian islands, which host some 500 species. A subset of fruit flies called the picture-winged drosophilids is represented in Hawaii by 106 species. All of the fruit fly species now present in the Hawaiian archipelago are thought to be the descendants of the same one or two ancestral females. Which one of the following can be inferred from the passage? ['All of the 1, 000 to 2, 000 species of fruit flies worldwide are believed to be the descendants of one or two females.', 'All of the picture-winged drosophilids in Hawaii are believed to be the descendants of the same one or two ancestral female fruit flies.', 'Some fruit flies originated in Hawaii and spread from there to other parts of the world.', 'Picture-winged drosophilids are found only in the Hawaiian islands.']