Final answer:
The correct type of fire extinguisher for a deep-fat fryer fire is a Class K extinguisher, which typically uses wet chemicals specially formulated for cooking fires. Of the choices presented, a Foam fire extinguisher is the most suitable as it suppresses flames without spreading the burning oil.
Step-by-step explanation:
The only type of fire extinguisher that should be used on a fire in a deep-fat fryer is a Class K fire extinguisher, which is typically a wet chemical extinguisher in the United States. However, since the options provided don't include a Class K extinguisher, the closest correct answer from the choices given would be D) Foam fire extinguisher.
This is because water can spread the oil and worsen the fire, CO2 extinguishers could blast burning oil out of the fryer, and dry powder extinguishers could also spread the burning oil. Foam extinguishers are the most appropriate of the options given because they can effectively suppress the flames without spreading the burning grease. However, please note that the standard and recommended choice for cooking fires, particularly deep-fat fryers, is a Class K extinguisher not listed among your options.