Your answer is a, opinions expressed should be supported by important facts, examples, or personal experiences.
C.
First of all, in this statement the speaker introduces herself and immediately lets the audience know why this topic is so important to her. Audiences are more likely to be invested in a speech if they know the speaker is personally invested in the cause. It also begins with an example of pathos--an emotional appeal to the audience--which is effective in drawing an audience in.
You want to avoid throwing a lot of numbers or other researchers' names at the audience immediately upon starting (even though you will definitely want to use those things within the speech) because they will make the tone seem too formal or fact-based before the audience has a chance to become invested.
Answer:
the spelling and the grammer
Explanation:
