The two major geographic components of Southeast Asia are
(A) the Rann of Kutch and the Irian tidal zone.
(B) an archipelago (today's Indonesia and the Philippines) and a mainland zone from the Malay Peninsula north to China.
(C) the Mekong Delta and the Cao Highlands.
(D) the Sargasso Hills and the Red River plain.
(E) the Tiananmen Valley and the Angkor Strait communities.
Answer: B.