A customer runs POWER7+ servers managed by the HMC 7042-CR4 with firmware V7R7.9.0.
The customer will purchase a Power E870 server and wants to manage all servers from the same HMC.
How can this be accomplished, if necessary?

A.
Purchase a 7042-CR9 HMC.

B.
Upgrade the HMC code to V8R8 2.0.

C.
The current HMC configuration already meets the customer requirements.

D.
MES the existing HMC to a 7042-CR5.

Explanation:
HMC Version 8 can be used for POWER8, POWER7, and POWER6 based servers.
HMC Version 7 can used for POWER7, POWER6 and POWER5 based servers.
https://www-304.ibm.com/support/customercare/sas/f/hmcl/home.html