Which statements about the state of practice in recognition are correct?
A、Few states accept that they are obliged to accord recognition in every instance.
B、International law does not require a state to recognize another entity as a state.
C、If the criteria for statehood have not been very well fulfilled, the new state shall be recognized by already existing states.
D、Non-recognition would amount to the denial of the actual existence of its statehood if an entirety has fulfilled the criteria for statehood.