单选] 一个项目团队中一些团队成员表示不舒服，一些表示对接下来需要做的事不清楚，一些表示出了对项目进度的担忧。请问这个团队现在属于塔克曼理论中的哪个阶段？Some team members on a project team expressed discomfort, some expressed a lack of clarity about what needed to be done next, and some expressed concern about the project schedule. What stage of Tuckerman's theory does this team belong to?