The correct answer is C - Training in areas of weakness.
Velocity can be improved when the team removes skill-based bottlenecks. If some members struggle due to lack of knowledge or technical gaps, their productivity-and the team's velocity-will be impacted. Targeted training helps the team overcome these weaknesses and deliver more efficiently.
PMI Agile Practice Guide:
"Improving technical and team skills through training and mentoring increases team performance and agility.
Learning is a continuous improvement activity that directly impacts delivery capacity." (PMI Agile Practice Guide, Section 6.4 - Developing People and Teams) Mike Griffiths adds:
"Velocity is driven by team capabilities. When teams address their weakest areas-through training, pairing, or knowledge sharing-they improve quality and throughput." (PMI-ACP Exam Prep, Chapter 4 - Team Performance) Other options:
* A supports communication but doesn't directly impact skill-based bottlenecks.
* B helps with planning but not necessarily performance.
* D describes the work cadence, not a practice that enhances velocity.