Final answer:
The Scrum Master should privately discuss with Lee to understand the reasons behind her tardiness and collaboratively seek a solution, emphasizing the importance of her participation in the Daily Stand-up for the team's success.
Step-by-step explanation:
The Scrum Master's best course of action when dealing with a team member, Lee, who has been late to the Daily Stand-up for the past week would be option D: In a private conversation, work with Lee to identify a solution and explain why her presence is so necessary for success. This action not only addresses the immediate concern but also reinforces the collaborative and supportive environment essential in Agile and Scrum frameworks. It allows the Scrum Master to understand if there are underlying issues causing Lee's tardiness and collaboratively find a workaround that suits both Lee and the team's needs. Options like escalating the issue to a manager or changing the team's working agreements should only be considered after such direct communication has failed to resolve the problem.