For a port standing on the boundary line between two zones or areas, the following correct statement is _______.

A、 The port cannot be regarded as within the zone or area from or into which the ship arrives or departs.;

B、 If a ship is entering a port, this port should be regarded as in an area where the ship is going to, whereas if a ship is leaving a port, then the port is regarded as in an area where the ship is coming from.;

C、A port standing on the boundary line between two zones or areas shall be regarded as within the zone or area from or into which the ship arrives or departs.;

D、The Competent Authorities should be consulted for determining the sea area it is in.