Which of the following best justifies the use of assessment centers?

Comprehensive and Detailed in Depth Explanation:

Assessment centers are structured evaluation processes that use simulations, exercises, and tests to assess candidates or employees for selection, development, or promotion.

Option A (They increase employees' productivity): Assessment centers evaluate potential, not directly increase productivity.

Option B (They help select the most qualified applicants): Correct, as assessment centers are often used in recruitment to identify the best candidates.

Option C (They help identify employees at risk for attrition): This is not a primary purpose of assessment centers.

Option D (They help determine the skill set of employees): Correct, as they assess skills, competencies, and potential.