Participating in Virtual Groups Can Be Difficult Because

Participating in virtual groups can be difficult because

A) some members underestimate the time needed to prepare and coordinate meetings.
B) some members find it easy to "hide" by doing something else or not paying attention to the discussion.
C) in addition to preparing for the session, members must be familiar and comfortable using the technology.
D) some members have difficulty taking turns during the session.
E) all of the above factors can make participating in virtual groups difficult.