A spark arrestor（）.<br>A:keeps sparks from falling into an open tank<br>B:secures covers on ullage openings<br>C:prevents sparks from getting out of an engine's exhaust system<br>D:grounds static electricity

A spark arrestor（）.
A:keeps sparks from falling into an open tank
B:secures covers on ullage openings
C:prevents sparks from getting out of an engine's exhaust system
D:grounds static electricity

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