whiCh oF thE Following DoEs thE Author not ExprEss
A．thE FunCtion oF toys is to inspirE plAy.
B．gooD toys ArE vEry importAnt to thE ChilDrEn' s growth.
C．toy shoulD BE ChosEn ACCorDing to ChilDrEn' s AgEs.
D．toys ArE still thE mAin sourCE oF lEArning For A stuDEnt.