Speakers use colloquial diction intentionally in order "to align themselves with the audience".
• Colloquial diction refers to the use of local or informal expressions. It is necessary in order for the speaker to be more comfortable with the audience.
• Using colloquial diction is also vital for the audience to understand the message that the speaker is passing.
• Option B is incorrect. Speakers don't use colloquial diction because they don't have other ways of speaking.
• Option C is incorrect. Using colloquial diction doesn't mean that it's cooler.
• Option D us incorrect. Using colloquial diction doesn't mean that the speaker doesn't want to speak to people that are not in a particular group.
• The correct option is "to align themselves with the audience".
