The answer you are looking for would be <em><u>option C. It helps you determine how effective the speech is.</u></em>
Explanation:
By learning what makes up a good speech, you are also learning what makes up a bad one and you are also gaining the criteria to notice when a speech is good and bad. Learning the qualities of a good speech can help you evaluate your own speech or someone elses' speech and help you determine how effective your communication really is.
