Which of the following statements is not true about group development?A. All the stages of group development are not necessarily of the same duration.B. All the stages of group development are not necessarily of the same intensity.C. Tuckman's theory of group development stages has been strongly supported by empirical testing.D. Effective groups and teams go through a maturation process.E. The storming stage may be particularly long, depending on the goal clarity and commitment and maturity of members.