Which of the following must be calculated to determine ROI?

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A legacy web application, which is being used by a hospital, cannot be upgraded for 12 months. A new vulnerability is found in the legacy application, and the networking team is tasked with mitigation. Middleware for mitigation will cost $100,000 per year .

Which of the following must be calculated to determine ROI? (Choose two.)
A . ALE
B . RTO
C . MTBF
D . ARO
E . RPO

Answer: A,D