单选题Fire protection regulations for towing vessels allow all of these types of fuel piping，EXCEPT（）.AsteelBaluminum in an aluminum-hulled vesselCschedule 80 fire resistant plastic pipeDnickel-copper，copper-nickel or annealed copper
单选题
Fire protection regulations for towing vessels allow all of these types of fuel piping，EXCEPT（）.
A
steel
B
aluminum in an aluminum-hulled vessel
C
schedule 80 fire resistant plastic pipe
D
nickel-copper，copper-nickel or annealed copper
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