Which of the following statements is most likely true regarding the norming stage of group development?
选项：

A:According to the five-stage group-development model, this is the second stage in the group development model.
B:This stage is characterized by a great deal of uncertainty about the group's purpose, structure, and leadership.
C:During this stage, members accept the existence of the group but resist the constraints it imposes on individuality.
D:During this stage, the group develops a common set of expectations of what defines correct member behavior.
E:During this stage the group performs the task at hand.