Using interpersonal skills to expedite the issue (Option B) involves direct communication, collaboration, and understanding with the technical service team to assess the problem's urgency, identify any roadblocks, and work together to expedite the resolution. In complex technical situations, effective communication, collaboration, and problem-solving are key. The senior project manager should engage with the technical service team, understand the challenges they are facing, and work collaboratively to find a resolution that minimizes the impact on project timelines.