单选题According to regulations，access to a cargo pumproom in a tanker carrying grades C or D liquid cargo shall be（）.Afrom areas equipped with power ventilationBonly from enclosed areas free from sources of vapor ignitionCfrom the open deckDfrom within the vessel
单选题
According to regulations，access to a cargo pumproom in a tanker carrying grades C or D liquid cargo shall be（）.
A
from areas equipped with power ventilation
B
only from enclosed areas free from sources of vapor ignition
C
from the open deck
D
from within the vessel
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