What are some of the basic communication requirements for effective audio and video conferencing? Select one: a. a. audio and video conferencing both require high quality audio. b. b. audio conferencing depends on high quality audio, but the major requirement for video conferencing is a quality video image. c. c. the major difference between them is that conversational turn taking is a concern for audio but not for video conferencing. d. d. getting participants to show up on time for the audio or video conference can be difficult.