You work at the library. A meeting has been called to start a discussion about adding beanbags and lounge chairs in one or more parts of the library. Most people have already contributed their ideas. The discussion has already gone on for 15 of the scheduled 20 minutes. Which of the following demonstrates ineffective group participation? Remind attendees that differences of opinion are respected. Announce that there are five minutes left of scheduled discussion time. Change the topic in order to briefly cover something not on the agenda. Invite those who have not participated to contribute their ideas.