According to your text, the self-concept influences much of our future behavior

The body of a speech:

a. is a longer version of a speech's conclusion b. is a shorter version of the speech's introduction c. contains the information necessary to support the central idea or thesis statement d. is a duplicate of the components of the formal outline

With regard for those "gray areas" of ethics pertaining to the use of sources in a speech, it is suggested that when in doubt,

a. document all of your sources in a speech. b. omit sources from your speech. c. include sources in a written bibliography, but do notcite them orally. d. use common knowledge rather than published sources.