Which element should determine whether your tone is formal or casual?

A. Your beliefs

B. Your background

C. Your audience

D. Your research

C. Your audience

Explanation:

Your audience should determine whether your tone is formal or casual. The audience's expectations for the speech can determine the tone. If the speech is meant to be lighthearted and informal, the tone of the speech must be casual. A formal tone would be used in an academic setting.

C. Your audience.

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