The project team has been asked to provide both a burndown as well as a burnup chart. When determining project progress and results using Agile methods, which statement BEST describes burnup chart? a. Quantitative review of changes in performance over time b. A visual presentation that starts at the total amount of planned work for a sprint and works toward zero c. A visual presentation that starts at zero and work their way up toward to the total amount of work expected d. Changing direction on next sprint based upon customer desires