Final answer:
In Scrum, the main difference from most traditional project teams is fixed roles and responsibilities. Hence the correct answer is option B
Step-by-step explanation:
In Scrum, the development team usually consists of team roles like designer, developer, and test. The main difference between Scrum and most traditional project teams is that Scrum has fixed roles and responsibilities. In Scrum, each team member is assigned a specific role and is responsible for their own tasks within that role.
Hence the correct answer is option B