Explanation
According to the PMBOK Guide 7th Edition, the project manager should create a high-performing team by fostering a collaborative, respectful, and trusting environment. The project manager should also help the team members to overcome personal and interpersonal issues that may affect their performance. Therefore, the project manager should advise the team member to focus on the current project and consider the past conflicts as lessons learned. This would help the team member to move on from the negative experiences and contribute positively to the project. Option B is incorrect because it implies that the team member should hide their personal information from the entire team, which could create a sense of isolation or mistrust. Option C is incorrect because it suggests that the project sponsor has the authority to decide what personal information can be shared with the entire team, which could violate the team member's privacy or autonomy. Option D is incorrect because it implies that the project manager needs to consult with HR and check company policies before advising the team member, which could delay the resolution of the issue or undermine the project manager's role as a leader. References: PMBOK Guide 7th Edition, Chapter 2: Creating a High-Performing Team, Section 2.1: Establishing a Team, p. 29-30.