The storming stage of team development is marked by: a. conflict and disagreement. b. orientation. c. establishment of order and cohesion. d. cooperation and problem solving.

# Brief Explanations: <br />In group development and psychology, the storming stage of team development is part of the Tuckman’s Model, developed by Bruce Tuckman in 1965. The model comprises five stages: forming, storming, norming, performing, and adjourning. The storming stage is known for the initial conflict and disagreement that arises as team members start to communicate their views and defend their positions. It usually follows the formation of the team when members are oriented and begin to understand the task at hand. It's a crucial stage as it sets the stage for a cooperative and problem-solving environment after resolving the conflicts.<br /><br /># Answer: <br />A. conflict and disagreement.