The correct and best answer is to explain agile basics to the team, so they understand what it’s about and know what to expect. The other responses are incorrect because they aren’t items required for all stakeholders on an agile team.
Since agile charters are different from traditional charters, the team may be confused if this was presented first. Several steps occur before an iteration is planned, so capacity should not be the first thing discussed either. Additionally,
there is no agile requirement for a communications planning document, nor must one be created together.