According to Incoterms 2000，( )means that the seller delivers when the goods pass the ship's rail in the port of shipment and the seller has to procure the cargo transportation insurance．

A．CFR

B．FCA

C．CPT

D．CIF

所有升降口、大小口洞、楼梯和平台，必须装设不低于___的栏杆。