单项选择题

Questions 9 and 10 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 Egyptian boat continued to approach the American ship probably because

A.the Egyptians thought it was OK to approach military vessels.
B.the ship was a civilian vessel and caused misunderstanding.
C.the Egyptians did not understand the words of warning.
D.no warning flare was fired by the U.S. navy on the ship.