【单选题】

Question 27 and 28 are based on the following news.At the end of the news item, you will be given 10 seconds to answer the questions.

Mr.Djordjevic ______.A．killed over 700 ethnicAlbanians from Serbia
B．catching hundreds of thousands from their homes to keep the ethnic balance in Kosovo
C．tried to conceal the bodies of those killed by ordering their transfer to sites in Serbia
D．was buried in mass graves