Comparing the sexual beliefs and customs of the inhabitants on the two different small islands of Inis Beag and Mangaia best demonstrates which of the following?

A. Island cultures have remarkably similar sexual attitudes throughout the Atlantic and Pacific Oceans
B. Cultures from small geographic locations typically have restrictive sexual attitudes and customs
C. People who consume large amounts of fish have more permissive sexual attitudes and customs
D. Sexual attitudes and customs can differ considerably between cultures