单选题The primary barrier of a bulk carrier is formed by（）.Athe single skin side shell and the inner bottomBdeck strips，hatch covers and coamingsCthe vertically corrugated transverse watertight bulkheadsDthe single skin side shell between topside and hopper tanks，and the cross deck strips，hatch covers and coamings
单选题
The primary barrier of a bulk carrier is formed by（）.
A
the single skin side shell and the inner bottom
B
deck strips，hatch covers and coamings
C
the vertically corrugated transverse watertight bulkheads
D
the single skin side shell between topside and hopper tanks，and the cross deck strips，hatch covers and coamings
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