When asked how to create an electromagnet, the best answer would be, "You can create an electromagnet by
A. applying a direct current to a non-magnetic material in order to create an electromagnetic field."
B. covering a wire with insulation and applying a direct electrical current to the magnet."
C. coiling a ferromagnetic material, wrapping in an insulator, and applying a current to the coil."
D. wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current."
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