The answer is A: Establishing individual goals and individual rewards.
Explanation for each option:
A. Establishing individual goals and individual rewards: This option is incorrect because promoting individual goals and rewards can lead to competition rather than collaboration within a team. It focuses on individual achievements rather than fostering a team environment.
B. Encouraging team communication to build team identity: This is a correct approach to promoting a team environment. Effective communication helps build a sense of identity and unity among team members, which is essential for teamwork.
C. Setting up systems and structures to require teamwork: This is also a correct approach. By creating systems and structures that necessitate teamwork, a leader can ensure that team members work together towards common goals, thereby promoting a team environment.
D. Establishing an environment of trust: This is another correct approach. Trust is fundamental in a team setting as it encourages open communication, collaboration, and mutual support among team members.
In summary, while options B, C, and D are strategies that promote a team environment, option A focuses on individual achievements, which can undermine team cohesion.