Final answer:
Ella is using the philosophy of Appeal to Authority by relying on a survey of Fortune 100 companies to justify the use of 360-degree performance reviews for her company.
Step-by-step explanation:
Ella believes that the effectiveness of a 360-degree performance review, which she learned about from a survey of Fortune 100 companies, makes it ideal for her company. She is relying on the philosophy of d) Appeal to Authority. This philosophy involves trusting the judgement or expertise of people or institutions considered authorities in a particular area, often because of their status, reputation, or expertise. The Fortune 100 companies in the survey are viewed as authorities on successful business practices, and Ella is using their reported effectiveness of the 360-degree performance reviews to justify their implementation in her own company.