Which of the Following Aspects Was Not Mentioned Concerning Norms

Which of the following aspects was not mentioned concerning norms for the Rocket Model of Team Effectiveness?

A) If the team or team leader is not explicit about setting the rules that govern team behavior, they will simply evolve over time.
B) The decisions the team makes, the way in which it makes decisions, how often and how long the team meets, should all be driven by the team's purpose and goals.
C) There are many team norms.
D) All of the above were mentioned concerning norms.