For his informative speech, douglas told his classmates how to get free food at a drive-through restaurant. rather than focusing on legitimate deals, such as student discounts or coupons, douglas talked about ways to trick employees into believing you had already paid for food when you had not. his instructor gave the speech a poor grade because it violated the ethical criteria for public speaking presented in your textbook. the guideline douglas violated was:
be fully prepared for each speech.
make sure your goals are ethically sound.
avoid name-calling and other forms of abusive language.
adapt to your audience's frame of reference.
avoid plagiarism.

I would contend that the right answer is the B) Make sure your goals are ethically sound.

Explanation: Just to elaborate a little on the answer, it can be added that if the speech did not inform the audience about legitimate ways for students to get free food (quite the opposite), that was not necessarily an example of plagiarism, name-calling and abusive language, lack of preparation, and lack of adaptation to the audience's frame of reference, but of an attempt to achieve a series of goals that are not ethically sound—such as trying to get free food by telling the employees of the restaurants that you had already paid for it, even though you hadn't.          

c. monica received many complements about her homemade lasagna.

explanation:

monica received many complements about her homemade lasagna uses the underlined word complements correctly.