challenge: Who were Oleg Stepko's teammates at the 2012 Summer Olympics in the Men's artistic team all-around?
  
  A. Mykola Kuksenkov, Igor Radivilov, and Vitalii Nakonechnyi
  B. Oleg Verniaiev, Vitalii Nakonechnyi, and Igor Radivilov
  C. Oleg Verniaiev, Mykola Kuksenkov, and Igor Radivilov
  D. Oleg Verniaiev, Mykola Kuksenkov, Igor Radivilov, and Vitalii Nakonechnyi
  Answer: 