The project sponsor requests that the team Timebox certain high-priority functionality. When Project Chartering using Agile methods, which statement is best describing Timebox? a. Signatures and commitment by product owner and team. b. Short time period when team commits to creating specific deliverables. c. A defined number of hours or days to complete an agreed-upon amount of work. d. Agreement on exactly how the Product Owner (PO) will judge the deliverables produced