The correct answer is C. Agenda.
An agenda is a list of items to be discussed at a meeting. It is typically created by the meeting organizer and distributed to participants in advance of the meeting. The agenda helps to ensure that the meeting is focused and productive.
A schedule is a list of events or activities that are to take place at a particular time. It is typically used to plan and coordinate activities.
A timetable is a schedule that shows the times at which events or activities are to take place. It is typically used to plan and coordinate complex activities.
A plan is a detailed proposal for doing or achieving something. It is typically used to guide and coordinate actions.