The Main Difference Between the Parts of the Island Pacific

The main difference between the parts of the Island Pacific settled before 10,000 B.C.E. and those parts settled later is that

A) later settlers had an easier time creating permanent settlements because they came equipped with well-developed technologies.
B) later settlers found islands rich in plant and animal life that had not yet been touched by earlier settlers.
C) earlier settlers found islands with relatively poor soil and therefore left to seek out islands better capable of supporting life.
D) later settlers encountered smaller islands with less plant and animal diversity.