What is the correct Enterprise Vault 80 (EV) core upgrade path?

A.
An EV 80 upgrade requires EV 70 Service Pack 1 or later.

B.
An EV 80 upgrade can be performed directly from Enterprise Vault 2007

C.
An EV 80 upgrade can be performed directly from EV 60 service Pack 6 or later.

D.
An EV 80 upgrade requires Enterprise Vault 2007 Service Pack 5