The experimental value of the magnetic moment of a $Mn^{2+}$ complex is $5.96 \ BM$. This indicates that:

• A
  The orbital motion and spin motion of the electron are in the same direction.
• B
  The orbital motion and spin motion of the electron are in opposite directions.
• C
  The electron has no orbital motion; it only has spin motion.
• D
  The electron has no spin motion; it only has orbital motion.