Which of the Following Statements Are True for Full Virtualization

Which of the following statements are true for full virtualization?

A) Full virtualization does not require changes to the guest operating systems.
B) Full virtualization has no performance impact compared to a non-virtualized bare-metal installation on the same machine.
C) Full virtualization has a severe performance impact and should not be used in production environments.
D) Full virtualization may be supported by special CPU extensions that provide better performance.
E) Full virtualization always requires additional software components and cannot be done using Linux only.