challenge: What is the total area of McHenry, North Dakota, according to the United States Census Bureau?
  
  A. 0.10 square miles (0.26 km2)
  B. 2.60 square miles (6.73 km2)
  C. 1.00 square mile (2.60 km2)
  D. 0.26 square miles (0.67 km2)
  Answer: 