Which component is only required on the monarch module of an HP Integrity i2 server?

A.
scalable memory buffers

B.
ICH mezzanine card

C.
memory

D.
management processor

Explanation:

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=115&
prodSeriesId=4186432&prodTypeId=3709945&objectID=c02714983
HP Integrity BL8x0c i2 Servers – How to Add a Partner Blade
Information
Only HP Integrity, BL870c i2 servers with monarch blade in an even bay (server in bays 2 and 3, 4
and 5 or 6 and 7, using full-height numbering) and BL860c i2 servers do support partner blades.
HP Integrity BL870c i2 servers with monarch blade in an odd Day (server in bays 1 and 2. 3 and 4,
5 and 6, or 7 and 8. using full-height numbering; and BL890ci2 servers do NOT support partner
blades.
The monarch blade of an BL870c i2 server is the blade unit in the lowest bay number. So for a
C7000 enclosure it is the left one, and for a c3000 enclosure it is the upper one.
PCIe Gen-1(driven from the ICH10) provides the interface to the partner blades. A separate
mezzanine pass-thru card is not required.
Only the designated monarch blade should contain an ICH mezzanine board.