challenge: How are features identified and realised on lunar maps in relation to Manners crater?
  
  A. By placing the letter on the rim of the crater
  B. By placing the letter at the center of the crater
  C. By placing the letter on the side of the crater midpoint that is closest to Manners
  D. By placing the letter on the side of the crater midpoint that is farthest from Manners
  Answer: 