challenge: What was notable about Rupert Hollaus' victory at the 1954 Isle of Man TT?
  
  A. He was the youngest rider to win the event
  B. He completed the circuit in under 30 minutes
  C. He was one of only seven riders to have won an Isle of Man TT race in their first attempt
  D. He won the event on a bike with a 250cc engine
  Answer: 