An electric current is passed through an aqueous solution (buffered at pH = 6.0) of a alanine (p^H = 6.0) and arginine (p^H = 10.2). The two amino acids can be separated because

• A

  alanine migrates to anode, and arginine to cathode.

• B

  alanine migrates to cathode, and arginine to anode.

• C

  alanine does not migrate, while arginine migrates to cathode.

• D

  alanine does not migrate, while arginine migrates to anode.