challenge: Where were the courses for the 8 Metre sailing event located at the 1928 Summer Olympics?
  
  A. North of the Isle of Marken on the Baltic Sea
  B. East of the Isle of Marken on the Zuiderzee
  C. West of the Isle of Marken on the North Sea
  D. South of the Isle of Marken on the Wadden Sea
  Answer: 