An engineer needs to replace a memory DIMM in an HP proliant server.
Which precautions must be taken? (Select two)
A. Ensure that the relative humidity level is below 30%
B. Use an ESD wrist strap
C. Touch the chassis ground, holding the DIMM to ensure it is grounded
D. Remove the server from the data center and bring it into the office environment for the replacement
E. Use an ESD mat