What must be taken into account when using the HPE FlexFabric 5945 4-slot Switch as a ToR switch in a solution?

A. adding in a Network Analytics Engine license

B. specifying a fan tray with the appropriate direction of airflow
C. adding in an Intelligent Resilient Framework license
D. selecting power supplies with adequate reserve PoE+ capacity

Reference: https://www.hpe.com/uk/en/product-catalog/networking/networking-switches/pip.hpe-flexfabric-5945-switch-series.1010931108.html