Which of the following is true?

(A). KWIC was developed by H.P. Luhn of IBM in the International Conference of Scientific Information held at Washington in 1958

(B). The KWWC (Key-Word-With-Context) is another version of KWIC, where only the part of the title (instead of a full title) relevant to the keyword is considered as an entry term.

(C). In WADEX the names of authors are also treated as keywords along with significant subject terms facilitating to satisfying author approach.

(D). In the DKWIC (Double KWIC) Index the keyword is extracted from the Call Number and regarded as the main index term