Fuel oil is regularly transferred to the day tank in order to （）<br>A:allow impurities to settle out of the fuel<br>B:allow air to escape from the fuel<br>C:make fuel available for immediate use<br>D:all of the above

Fuel oil is regularly transferred to the day tank in order to （）
A:allow impurities to settle out of the fuel
B:allow air to escape from the fuel
C:make fuel available for immediate use
D:all of the above

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