Final answer:
The work sampling technique, which involves candidates performing actual job tasks, is likely the assessment method with the least adverse impact on minorities, as it focuses on practical skills and performance.
Step-by-step explanation:
The assessment method most likely to have the least adverse impact on minorities when hiring new employees is D) the work sampling technique. This method involves giving job candidates tasks that are representative of the actual work they would be doing in the position. By focusing on practical skills and performance in real-world scenarios, this technique helps to minimize the potential for discrimination based on group membership, as opposed to individual ability. It directly assesses the candidate's ability to perform the job, rather than relying on indirect measures that could be influenced by cultural, educational, or socioeconomic backgrounds.