challenge: In which sessions of the Supreme People's Assembly did An Chang-ryon serve as a delegate?
  
  A. 9th (1990), 10th (1998), 11th (2003)
  B. 11th (2003), 12th (2009), 13th (2014)
  C. 10th (1998), 11th (2003), 12th (2009)
  D. 8th (1986), 9th (1990), 10th (1998)
  Answer: 