Answer: b. storming
Step-by-step explanation:
The Storming stage of group development is the stage where the roles of individuals become clearer in the group. They will start to see and understand how each team member works to meet targets and this is where conflict usually begins because team members might find their methods superior to the other.
This can then lead to heighten emotional levels and intragroup conflict making this the stage where most groups are most likely to fail.