A. It helps avoid the risk of tasks associated with a user story not moving through the Agile task board at an acceptable rate during an iteration.

B. It helps team members understand the current status of an iteration by visualising the amount of work left to do compared to the time allotted for the iteration

C. It helps the whole team be more effective in test case design by requiring all team members to master all types of test techniques.

D. It helps team members develop better relationships with each other and make their collaboration more effective for the benefit of the project.