Questions 7 and 8 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions. Now listen to the news. The violence erupted in the southern Calabrian town of Rosarno, because __
A．two immigrants were shot by white local youths. B．two immigrants fought with white local youths. C．African farm workers clashed with two polices. D．local security forces shot two African immigrants.