What was an important early drawback of the Clearboard system by Ishi – McqOptions

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1.	What was an important early drawback of the Clearboard system by Ishii et al. (1993).
A.	it required people to move to a dedicated video conferencing facility at their workplace
B.	as people moved closer to the board to talk with a remote colleague, the video system no longer picked them up
C.	people found it uncomfortable to interact “looking down” at a colleague.
D.	all of the above.
Answer» D. all of the above.

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