What king of an endeavor is advertising?

What is the most valuable resource in the library?

a. reference librarian b. online catalogue c. databases d. special collections

Self-disclosure is defined as

A. revealing basic information, such as one's name or hometown, to someone. B. communication in which the sender doesn't intend to tell something, but it just "slips out." C. the voluntary and intentional revealing of personal information to someone. D. a form of rumor or hearsay that develops about a person without her/his knowledge.