In what fundamental way does the overall solar magnetic field differ from that of Earth?
A) The solar field has the same polarity at both poles and the other polarity at the equator.
B) The Sun's overall magnetic field never reverses itself, while that of Earth has reversed itself many times in geological history.
C) The strength of the Sun's overall magnetic field is about 20,000 times more powerful than that of Earth.
D) The solar field lies just beneath the surface, while Earth's field passes through the whole Earth.
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