What EMC software product is used when replacing an I/O module on an EMC VNX Block Only storage syst

What EMC software product is used when replacing an I/O module on an EMC VNX Block
Only storage system?

A.
Unisphere Service Manager (USM)

B.
Navisphere Service Taskbar (NST)

C.
CLARiiON Array Properties (CAP)

D.
Unisphere Server Utility