Which task is conducted as part of the Business Case Alignment in the optimize phase?

Which task is conducted as part of the Business Case Alignment in the optimize phase?

A.
Execute use cases.

B.
Analyze actual data related to the deployment and operation of the system against the original business case.

C.
Create a set of thresholds by which a network route can be measured.

D.
Collect data using standards-based frameworks, such as ITIL, eTOM, or FCAPS, covering operations and network management and processes.