Listeners tend to distrust speakers who do not appear credible.

True.

Explanation:

Listeners tend to distrust speakers who do not seem credible. For this reason, any speech you give should be very well designed and studied so that you can speak with confidence and true information in order to give credibility to the audience listening to your speech. When the speech is credible, listeners will not distrust but trust their words.

the answer is

a) revise existing treaties

b) do away with political alliances

c) prevent the spread of communism

d) bring an end to european colonization

the main goal of the southeast asia treaty organization was to prevent the spread of communism in southeast asia.

can you explain a little further maybe give multiple choice? ?