Final answer:
The project manager blends Scrum and XP methodologies. So, option d is correct.
Step-by-step explanation:
The scenario described aligns with a combination of Scrum and XP (Extreme Programming). In Scrum, the iterative and incremental development approach is evident through sprints and retrospectives. The concept of a sprint retrospective, where the team reflects on the previous sprint's performance, is a Scrum practice. However, the project manager's decision to pair team members with different expertise during the next sprint to address a specific feature aligns with XP principles.
Extreme Programming emphasizes collaborative and cross-functional teams, promoting collective code ownership and skill-sharing among team members. The act of pairing an experienced team member with another who lacks expertise in a particular area is a manifestation of XP's values. It encourages knowledge transfer, and collaboration, and ensures that the team collectively possesses the skills needed for various aspects of the project. Therefore, the correct answer is (d) Scrum and XP.