The following expression( )are correct ways of stipulating time of shipment．

A．time for shipment
B．shipping documents
C．mode of payment
D．port or place of loading and unloading

A．The time of shipment should be stipulated only in a clear way in the L/C
B．The latest date for shipment shall not be extended by reason of the extension of the expiry date and/or the period of time after the date of shipment for presentation of documents
C．The exporter should consider whether he can get the goods ready before the shipment date and whether the ship is available if goods are ready
D．If the L/C simply stipulates an expiry date without a shipment date which means these two dates are the same