Select the best answer. A driver diagram: A. organizes information on proposed activities so the relationships between the aim of the improvement project and the changes to be tested and implemented are made clear B. refers to the idea that, in many situations, 20 percent of contributing factors account for 80 percent of the results C. enables teams to consider why a problem has occurred and search for the root causes D. is used to show hierarchies, workflows, or simple, singular datasets