The main goal of the southeast asia treaty organization was to a. revise existing b. do away with political alliances. c. prevent the spread of communism. d. bring an end to european colonization.

C. prevent the spread of communism.

Explanation:

The Southeast Asia Treaty Organization was an organization formed in 1955 that lasted until 1977 and it was formed by Australia, France, New Zealand, Pakistan, the Phillippines, Thailand, UK and US.

The main purpose of the organization was to block the spread of communism in Southeast Asia, but it was considered a failure because the countries that formed it had a series of conflicts.

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d. it adversely affected american productivity