General Knowledge · Library and Information Science

Which of the following statements regarding the Basic Principles of subject headings in library cataloguing are true? (A) The words or phrases used to express a subject must be in common usage. (B) When a subject can be represented by more than one term, choose the one which is more common in usage. (C) In subject cataloguing, the most important aspect is to use specific terms, which are co-extensive with the thought content of the book. (D) 'See also' references guide readers to other headings where they can find more information on related or more specific aspects of the subject.