Answer :
Final answer:
A Class D fire extinguisher is appropriate for oxidizer solids such as those found in the yellow flame of engines using a solid fuel/oxidant mixture.
Explanation:
The type of fire extinguisher that needs to be used on oxidizer solids, such as those found in the yellow flame from engines using a solid fuel/oxidant mixture, would be a Class D fire extinguisher. The class D extinguisher is specifically designed for fires involving combustible metals or solid oxidizing agents, which makes it the appropriate choice in this case. Class A is for basic materials like paper and wood; Class B is for flammable liquids like gas or oil; and Class C is designed for electrical equipment fires.
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