The optimal approach for Karan to take is:
D.
to inform the employees that their emails will be subject to monitoring
Explanation:
Oversight of employees' social media interactions straddles ethical considerations, thus it’s important to establish a best practice that aligns with the organization’s culture.
Workers should be made aware of the monitoring so they comprehend that it will occur.
Subsequently, checks can be conducted randomly or based on perceived trustworthiness.