Final answer:
Aphrodite should report the employee's violation of watching streaming videos during work hours to the supervisor or security office, adhering to company protocols and ethical standards.
Step-by-step explanation:
If Aphrodite, a member of (ISC)² and data analyst for Triffid Corporation, discovers a fellow employee violating the acceptable use policy by watching streaming videos during work hours, the most appropriate course of action would be option A: Report the violation to the supervisor or security office.
It is essential to follow the company's protocols and guidelines for such incidents. Confronting the employee directly, ignoring the violation, or sharing information on social media could lead to escalation of the issue, potential conflicts or breaches of confidentiality, and it does not align with professional ethical standards.