Which agreements about state responsibility are correct?<br/> A、State responsibility reflects that state or other political entities possessing international personality must be legally responsible for a breach of an international obligation.<br/> B、A state is liable for unlawful acts or omissions which cause other states or nationals of other states suffering.<br/> C、A state is to be rendered liable only for actions which may be attributed or imputable to the state.<br/> D、A state may be liable for an unlawful act even though it was beyond the legal capacity of a state organ involved.