challenge: What was the outcome of the airborne assault on the three bridges and Fort Ében-Émael?
  
  A. The assault was partially successful, but the fort's artillery pieces remained operational
  B. The assault was repelled, and the bridges were destroyed
  C. The assault resulted in the capture of all three bridges, but the fort's artillery pieces were not affected
  D. The assault was an overall success, with two bridges captured and the fort's artillery pieces disabled
  Answer: 