Principles for the researching a speech topic are included in the canon of disposition

In Whitney v. California, Justice Louis Brandeis emphasized the importance of:

a) more speech rather than enforced silence; b) the clear and present danger test; c) content-based regulations; d) content-neutral regulations; e) time, place and manner regulations.

Is it acceptable to use the personal story of a friend or colleague in a speech? Why or why not?

Fill in the blank(s) with the appropriate word(s).