Full virtualization allowsunmodified guest operating systemsto run in virtual machines, making statementB correct. The hypervisor presents a complete hardware abstraction to the guest OS.
Historically and conceptually, full virtualization relies onCPU emulation or hardware-assisted virtualization, making statementCcorrect. Even with hardware extensions, some degree of emulation is involved.
Full virtualization alsorequires additional system resources and processing timeto emulate hardware and manage isolation, making statementEcorrect.
Statement A is incorrect because paravirtualization often offers better performance. Statement D is incorrect because emulated I/O devices generally perform worse than paravirtualized drivers.
Therefore, the correct answers areB, C, and E.