challenge: What is a notable feature of the all-electric Spacebus NEO platform?
  
  A. It is only capable of carrying payloads weighing under 1,000 kg
  B. It has a power output of less than 10 kW
  C. It is only available with a single propulsion version
  D. It can carry payloads weighing over 1,400 kg and has power exceeding 16 kW
  Answer: 