$A$ colloidal solution is subjected to an electric field,and the colloidal particles move towards the anode. The amount of electrolytes $BaCl_{2}$,$AlCl_{3}$,and $NaCl$ required to coagulate the given colloid is in the order:

• A
  $NaCl > BaCl_{2} > AlCl_{3}$
• B
  $BaCl_{2} < AlCl_{3} > NaCl$
• C
  $AlCl_{3} = NaCl = BaCl_{2}$
• D
  $AlCl_{3} > BaCl_{2} > NaCl$