What should you install with a server for a customer who may need to perform maintenance on the server while it is the rack? (Select two.)

What should you install with a server for a customer who may need to perform maintenance on the server while it is the rack? (Select two.)
A . Cable Management Arm (CMA)
B . redundant PDUs
C . high performance fan kit
D . rack stabilization kit
E . blanking panels

Answer: AD