challenge: What is the relationship between Heisei Ultraseven and the 1967-68 tokusatsu series Ultraseven?
  
  A. Heisei Ultraseven is a remake of the original Ultraseven series
  B. Heisei Ultraseven is a standalone sequel to the original Ultraseven series
  C. Heisei Ultraseven is a prequel to the original Ultraseven series
  D. Heisei Ultraseven is a spin-off of the Ultraman series
  Answer: 