How is the 19 inch PCIe Gen3 I/O Expansion Drawer connected on POWER8 systems?

How is the 19 inch PCIe Gen3 I/O Expansion Drawer connected on POWER8 systems?
A . PCle x8 SR-IOV adapter
B . PCIe Gen3 Infiniband adapter
C . GX++ bus
D . Optical CXP Converter adapter

View Answer

Answer: D