Why should listeners pay close attention to word choice?
to better understand the speaker's intentions
so as not to confuse connotation and tone
to allow their emotions to be manipulated by the speaker
all of these

To better understand the speaker's intentions.

Explanation:

When an author writes any text, he puts particular attention to his choice of words. He does so because he is aware of the fact that particular words have particular connotations and meanings. Therefore, he has to chose those that best suit his purposes. If the reader pays close attention to the word choice of the author, he will better understand the speaker's intentions.

lets none because you provide no details.