Final answer:
The HR director should conduct stay interviews with employees to periodically review benefit offerings and track retention rates.
Step-by-step explanation:
To determine if the organization is realizing benefit from the proposed solution of increasing pay and benefits, the HR director should take action C: conducting stay interviews with employees to periodically review benefit offerings and track retention rates.
Stay interviews are one-on-one meetings with current employees to assess their level of satisfaction, gather feedback, and identify any concerns or areas for improvement. By conducting stay interviews, the HR director can directly engage with employees, understand their needs and preferences, and track retention rates to evaluate the effectiveness of the pay and benefits changes.