Questions 6 to 8 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each question. Now listen to the news. The head of homeland security indicated that ______.

A．the worry about terrorist attack was totally unnecessary
B．the government had been well prepared for possible security problem
C．the government had been too optimistic about its anti-terrorism efforts
D．the legislators usually could do nothing except making empty talks