Computer Networks·Error Detection & Access Control·FoundationDetecting or correcting?A frame arrives and its parity bit does not match.What does the receiver know, and what can it do?AThat a bit is wrong somewhere, but not which one, so it discards the frameBWhich bit is wrong, so it flips that bit and keeps the frameCNothing useful, since parity fails to detect any real errorsDThat the frame was lost, so it requests the whole message againCheck answer