In the opening words of a speech, you should

Heurism refers to

a. Whether a theory is practically useful in making us better communicators b. How wide or narrow the theory is in terms of what it describes c. Whether the concepts of a theory can be measured and the relationships tested d. Whether a theory leads to discussion and research about a topic

Tim?s speech about President Kennedy began ?Ask not what your country can do for you; ask

what you can do for your country.?  Tim was using ________ to begin his speech. A) a familiar term B) a quotation C) a reference to a previous speaker D) a brief story