How do you distinguish between the dorsal and ventral surfaces of the body of an earthworm?

• A
  The dorsal surface is marked by a dark median mid-dorsal line, while the ventral surface is distinguished by the presence of genital openings.
• B
  The dorsal surface is smooth, while the ventral surface is covered with setae.
• C
  The dorsal surface has the mouth, while the ventral surface has the anus.
• D
  The dorsal surface is lighter in color, while the ventral surface is darker.