What exponent (?) is needed to represent

_________ typically include both audio and video, take place via a personal computer or mobile device, and are used by businesses and individuals. A. Web conferences B. Cue channels C. Distribution frames D. Production elements

Fill in the blank(s) with the appropriate word(s).

Which of the following is NOT a list you can use to manage your web results.?

A. ?Reading B. ?Notes C. ?History D. ?Downloads