Which of the following is the best evidence that work has been done on or by an object?

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

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