Answer:
Restate the thesis by making the same point with other words (paraphrase). Review your supporting ideas. For that, summarize all arguments by paraphrasing how you proved the thesis. Connect back to the essay hook and relate your closing statement to the opening one.
Explanation:
What to include
Your conclusion wraps up your essay in a tidy package and brings it home for your reader.
Your topic sentence should summarize what you said in your thesis statement. ...
Do not simply restate your thesis statement, as that would be redundant. ...
Your conclusion is no place to bring up new ideas.
The answer to the first blank is C. It is important for a speaker to understand the needs of the audience because it helps the speaker to hone their message for the audience. Understanding the audience will give you the idea of what your audience is like then you can adjust yourself accordingly so that you can approach to them easily and you can be understood by them.
The answer to the second blank is B. Writers should avoid jargon because jargon limits what ideas can be explored. If a writer uses jargons, he wouldn't be able to write much because jargons are easily understood by people and there will be no need of further explanation.
"Unable to do" in one word is "incapable."
Incapable means "unable to do or achieve (something)."