challenge: How did teams qualify for the final A in the 2019 IAAF World Relays Men's 4 × 400 metres relay?
  
  A. The top 2 teams from each heat and the 2 fastest times overall
  B. The top team from each heat
  C. The top 2 teams from each heat
  D. The top team from each heat and the 2 fastest times overall
  Answer: 