Which BIOS setting is required for a VMware ESXi 5.0 host to support Cisco VM-FEX universal pasthrough mode?

Which BIOS setting is required for a VMware ESXi 5.0 host to support Cisco VM-FEX universal
pasthrough mode?

A.
VT for Directed IO

B.
ACPI 10 Support

C.
VEMDPA Agent

D.
Execute Disabled Bit

F.
Processor C State