Of the Following Four Islands at the Same Latitude, the One

Multiple Choice

Of the following four islands at the same latitude, the one possessing the fewest species is

A) 1,000 square kilometers in area and 300 km from the mainland.
B) 3,000 square kilometers in area and 100 km from the mainland.
C) 100 square kilometers in area and 3,000 km from the mainland.
D) 300 square kilometers in area and 1,000 km from the mainland.
E) none of these.