Questions 8 to 9 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 protest was ______.

A．Key scientific journals are authoritative in evaluating scientific papers.
B．Peer-review is the most effective method in evaluating and selecting scientific papers.
C．Scientists are less likely to achieve career success without publications in top papers.
D．Fabricating evidence in scientific researches can be discovered by evaluation strict enoug

A．necessary element
B．chief goads
C．metal stick
D．metal bar