In the gel electrophoresis method . . . . . . .

• A
  Fragments of $DNA$ can be seen without being stained.
• B
  $A$ natural polymer extracted from seaweed is used as the medium (gel).
• C
  Glowing orange bands of $DNA$ can be seen upon exposure to visible light on an ethidium bromide-stained gel.
• D
  The larger the size of the $DNA$ fragment in the agarose medium,the farther it will move.