challenge: Where is Castelbaldo located in relation to Venice and Padua?
  
  A. 80 km southwest of Venice and 45 km southwest of Padua
  B. 50 km southwest of Venice and 28 km southwest of Padua
  C. 80 km southwest of Venice and 28 km southwest of Padua
  D. 20 km southwest of Venice and 45 km southwest of Padua
  Answer: 