Make a judgment call. If the person who prepares the agenda is insecure about it, ask the circle. It will be best to make it clear which agenda items are being selected out of the whole set, for example by showing the entire backlog and highlighting the ones that are selected for the meeting. Be sure to use your meeting time as efficiently as possible by delegating and preparing agenda items and by preparing a solid agenda.
For more information, check out our handbook Many Voices One Song chapter 5