The project manager is sequencing a set of activities. They discover that some of the activities may or may not occur based on the outcome of other activities. Which of the following is BEST suited in

A Gantt chart is a scheduling tool that displays task durations over time but is less effective at explicitly illustrating complex conditional logic or 'may or may not occur' relationships between activities.

The Arrow Diagramming Method (ADM), also known as Activity-on-Arrow (AOA), is best suited because it explicitly represents activity sequences and logical relationships using arrows for activities and nodes for events, which can effectively depict conditional paths. This method clearly shows which activities must be completed before others can start, including instances where activities may or may not occur based on prior outcomes.

CCB stands for Change Control Board, which is a body responsible for approving or rejecting changes to a project, not a method for sequencing project activities.

CCM is not a recognized project management method for sequencing activities and their logical relationships in this context; it might refer to Cloud Cost Management or other unrelated concepts.