challenge: What was one of King Gustavus' reasons for wanting to reach out west in Germany in 1630?
  
  A. To capture the city of Berlin
  B. To declare war on the duke of Hesse-Kassel
  C. To restore his cousins to their duchies in Mecklenburg
  D. To form an alliance with the Electorate of Saxony and the Electorate of Brandenburg
  Answer: 