What can be installed in a PCI expansion blade? (Select two.)

A.
one or two PCI-e cards

B.
two PCI-X and two PCI-e cards

C.
one or two PCI-X cards

D.
one PCI-X and one PCI-e card

Explanation:
http://h18000.www1.hp.com/products/quickspecs/12753_div/12753_div.PDF