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Which impairment emerged gradually on 18th-century wooden ships traversing diverse climates?

A)Insufficient hull sheathing copper prevents biofouling
B)Decreased speed with drag from barnacles
C)Seawater intrusion enhances galvanic corrosion
D)Rudder stock jamming due to hygroexpansion

💡 Explanation

Differential swelling strains fasteners, because the hygroexpansion mechanism causes varying timber expansions that can jam the rudder; therefore the rudder jams intermittently, rather than uniform external corrosion.

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