Questions 21～22 are based on the following news from the BBC or the VOA. At the end of the news item, you will be given I0 seconds to answer the two questions. Now listen to the news. The 452 million dollars was the total amount of money that ______.
A．the US owed to the UN B．the US was required to pay by December C．the US Congress approved for arrears payment D．the US paid to the UN as part of the arrears payment