Which of the following statements is CORRECT about the earth's magnetic field?

• A.the angle of dip is the angle which a freely suspended magnet makes with the vertical
• B.the angle of declination is the angle between the magnetic meridian and the geographic meridian
• C.the angle of declination is the angle which a magnetic compass makes with the magnetic meridian
• D.the angle of inclination is the difference between the angle of dip and the angle of declination
• E.