The correct answer is D - Use the team's historical velocity to calculate a range of features that can be delivered. Agile emphasizes forecasting over commitment, and this is achieved through empirical data such as velocity. Providing a range based on historical velocity allows for realistic planning while acknowledging uncertainty.
From the PMI Agile Practice Guide:
"Agile forecasting is based on empirical data. Teams use their past velocity to forecast how much work they can complete in a given time frame. This forecast is typically expressed as a range to account for variability." (PMI Agile Practice Guide, Section 5.3 - Adaptive Planning and Forecasting) Mike Griffiths supports this:
"Rather than commit to fixed scope, agile teams use historical velocity and prioritized backlogs to forecast delivery. Forecasts are probabilistic, not promises." (Mike Griffiths, PMI-ACP Exam Prep, Chapter 5 - Estimation and Forecasting) Incorrect options:
* A violates agile's core value of responding to change over following a fixed plan.
* B delays valuable forecasting data.
* C implies commitment rather than forecast.