Which of the following is incorrect about Integrated Services Digital Network? 

(A). ISDN refers to a set of telecommunication standards and techniques that enable the transmission of various forms of communication, such as data, voice, and video, over a public telephone network using digital signals.

(B).​ BRI encompasses two data-bearing channels ('B' channels) and one signaling channel ('D' channel) used for initiating connections.

(C). B-ISDN relies predominantly on the evolution of fiber optics.

(D). The groundwork for the standard commenced in 1980 at Bell Labs, culminating in its formal standardization in 1988 within the CCITT "Red Book."