What was the purpose of the Southeast Asian Treaty Organization (SEATO)?

SEATO established a network of trade agreements to promote capitalism in Southeast Asia.
SEATO sought to provide regional security in Southeast Asia by establishing alliances.
SEATO linked Southeastern Asian countries through a highway system that promoted migration.
SEATO loosely connected Southeastern Asian countries by promoting demilitarization.
I know the main goal was to prevent communism, my best guess is D?

1 answer

Wasn't D. Maybe B