challenge: What is the total area of the village of Castine, according to the United States Census Bureau?
  
  A. 0.05 square miles (0.13 km2)
  B. 0.10 square miles (0.26 km2)
  C. 0.15 square miles (0.39 km2)
  D. 0.08 square miles (0.21 km2)
  Answer: 