单项选择题

Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions.
Now, listen to the news.

The announcement of the ceasefire has been delayed because

A.Hamas has not agreed to stop attack against Israel.
B.Israeli troops have not withdrawn from parts of the Gaza Strip and Bethlehem.
C.the Islamic Jihad has not agreed to join the agreement.
D.there has been some disagreement over the wording of the ceasefire.