The correct answer is Team members must manually add a status to the project workflow after adding a new column.

Team members must manually add a status to the project workflow after adding a new column is not accurate because in a team managed project the board and workflow are tightly integrated and adding a column will create or map a status automatically. You do not have to separately add a status in the workflow after creating a column on the board.

Issues can be grouped by subtasks is an incorrect choice because it describes a real board capability. Team managed boards let you view and group issues using hierarchy or related task relationships so subtasks can be used as a grouping dimension.

Board users can rename statuses directly from the board is an incorrect choice because it reflects how team managed boards work. Renaming a column on the board updates the associated status name so users can effectively rename statuses from the board interface.

A single column may contain multiple statuses at once is an incorrect choice because it correctly describes board configuration. Boards can map one or more workflow statuses to a single column so a column can represent multiple statuses that are treated equivalently on the board.

Issues can be grouped by assignee is an incorrect choice because it states a standard and available grouping option. Grouping by assignee is a common way to organize work on team managed boards and is supported by the interface.

Full AWS Practitioner Certification Question