The correct answer is E. None of the above.
A fire hose is used to extinguish large fires, and it would be too powerful to use on a computer fire. A class A extinguisher is used for fires involving ordinary combustibles such as wood, paper, and cloth. A class C extinguisher is used for electrical fires. Silver foam water is not a type of fire extinguisher.
The best way to extinguish a computer fire is to use a class B extinguisher, which is designed for fires involving flammable liquids. If you do not have a class B extinguisher, you can try to smother the fire with a blanket or towel. However, it is important to remember that computer fires can be very dangerous, and it is best to leave them to the professionals.