Read the following human resources analysis titled "New-Teacher Mentoring Review". New teachers in one district were paired with trained mentors who observed lessons, met weekly, and did not participate in formal evaluations. Eighty-six percent of that cohort returned the following year, compared with seventy-eight percent of the previous cohort. The report notes that hiring conditions and school assignments also differed between years. Surveyed participants valued confidential feedback but asked for fewer meetings during report-card weeks. Which abstract accurately reflects the comparison, caveat, and participant feedback?