How can a magnetic field be used to generate an electric current?

a.
electric current flows when a stationary magnet causes the magnetic field to change.

b.
electrons in a wire flow when a stationary magnet causes the electrical field to change.

c.
when a magnet moves near a wire, the domains in the magnet line up and flow through the wire as electric current.

d.
when a magnet moves near a wire, its changing field causes the electrons in the wire to flow as electric current.