challenge: What was the outcome of the Republican offensive in the Battle of Belchite?
  
  A. The Nationalists postponed their big offensive in the north and Zaragoza was captured
  B. The Republicans successfully captured Zaragoza and the Nationalists postponed their big offensive in the north
  C. The Republicans completely defeated the Nationalists and took control of the entire region
  D. The Republicans gained some initial success, but failed to capture Zaragoza and did not stop the Nationalists' big offensive in the north
  Answer: 