The project manager should set clear expectations with the new team member and explain the differences between the agile and predictive approaches, as well as the benefits and challenges of working in a hybrid environment. The project manager should also encourage the new team member to share their agile experience and best practices with the existing team members, and foster a collaborative and learning culture among the team. Training the new team member in the predictive approach (A) is not enough, as it does not address the potential gaps and conflicts that may arise from working in a hybrid environment. Acknowledging that hiring the new employee is a risk (B) is not helpful, as it may create a negative impression and undermine the trust and respect among the team members. Meeting with all team members and explaining the new employee's position (D) is also not sufficient, as it does not clarify the expectations and roles of the new team member, nor does it leverage their agile experience. References: PMBOK Guide, 7th edition, page 91; Agile Practice Guide, page 14.