challenge: What is the total area covered by California Hot Springs, California, according to the United States Census Bureau?
  
  A. 1.0 square mile (2.6 km2)
  B. 0.7 square miles (1.9 km2)
  C. 0.5 square miles (1.3 km2)
  D. 1.5 square miles (3.9 km2)
  Answer: 