PT 1 S4 Q2

Only 1,000 to 2,000 species of fruit flies exist worldwide. Nowhere in ... ...

Which one of the following can be inferred from the passage?
(A) All of the picture-winged drosophilids in Hawaii are believed to be the descendants of the same one or two ancestral female fruit flies.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Drawing Conclusions: Intro Set