An agile leader notices that one team member consistently fails to complete the deliverables on...

The agile leader should speak directly with the team member about improvements and commit to an agreed-upon time frame. This is the best option because it shows the agile leader’s respect and empathy for the team member, as well as the willingness to help them overcome their challenges and grow their skills. By speaking directly with the team member, the agile leader can also understand the root cause of the problem, provide constructive feedback, and agree on a realistic and achievable plan for improvement. This option also aligns with the agile values of “individuals and interactions over processes and tools” and "responding to change over following a plan"1.

The other options are not as effective as option D. Option A is not supportive and may demotivate the team member and create resentment. Option B is not appropriate and may embarrass the team member and lower the team morale. Option C is not relevant and may not address the team member’s specific needs and gaps. References: 1: Agile Manifesto, [Manifesto for Agile Software Development]