Which of the following is a bus mastering method?

Which of the following is a bus mastering method? (Select TWO).

A.
A device transfers data directly to the memory.

B.
A device handles mediation between the northbridge and the processor.

C.
A device connects to another device without involving the processor.

D.
A device transfers data to the processor and then on to the memory.

E.
A device handles mediation between the southbridge and the processor.