challenge: What was the top speed of the German torpedo boat Jaguar, according to its design specifications?
  
  A. 40 knots (74 km/h; 46 mph)
  B. 30 knots (56 km/h; 35 mph)
  C. 34 knots (63 km/h; 39 mph)
  D. 25 knots (46 km/h; 29 mph)
  Answer: 