In the Context of Canons of Cataloguing which of the following is true?

(A). The first set of normative principles was introduced in the Theory of Library Catalogue published in 1938. 

(B). The Canon of Relevance of Theory was renamed as Canon of Sought Heading.

(C). The third formulation of cataloging canons is found in the Classified Catalogue Code, Ed 5 (1964). It omitted the Canon of Purity and added the Canon of Relevance

(D). The latest formulation of cataloging canons and principles was presented in the December 1969 issue of Library Science with a Slant to Documentation.