AccordingtoMARPOL73/78，Toenablepipesofreceptionfacilitiestobeconnectedwiththeship’sdischargepipelineforresiduesfrommachinerybilgesandfromoilresidue（sludge）tanks，bothlinesshallbefittedwithastandarddischargeconnectionthequantityoftheBoltsandnutsforthestandarddischargeconnectionis（）.
A.5
B. 4
C. 6
D. 8
