单项选择题

The ventilation system of your ship has fire dampers restrained by fusible links. Which statement is TRUE?（）

A.A fusible link will automatically open after a fire is extinguished and reset the damper
B.Fusible links must be replaced at every inspection for certification
C.Fusible links are tested by applying a source of heat to them
D.Fusible links must be replaced if a damper is activated

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