ANSWER · A
Flammable solids are substances that exist as solids at normal temperature, have a low ignition point, and can ignite from heat, impact, friction, or oxidants. Only matches qualify as flammable solids; the other options are flammable and explosive solids. Explosives are substances that can produce explosive phenomena, such as dynamite, detonators, and black powder. Dust, combustible gases, fuel, sawdust, and similar substances that can explode under specific conditions are also explosives in a broad sense.
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