challenge: What is the typical color pattern on the head of D. shinei, also known as Shine's whipsnake?
  
  A. Lemon yellow with a narrow grey-brown crossband on the nape
  B. Pale grey-brown with a narrow brown crossband on the nape
  C. Brown with a narrow yellow crossband on the nape, followed by a wider brown crossband
  D. Grey-brown with a wide yellow crossband on the nape, followed by a narrow brown crossband
  Answer: 