Questions 29 ～ 30 are based on the following news from the BBC or the VOA. At the end of the news item, you will be given JO seconds to answer the two questions. Now listen to the news. US officials are concerned over this radar issue because ______.
A．they feel that this technology could post as a potential threat to the US B．they are worried the new technology might be used against Taiwan C．they fear that it might spark tension in the Taiwan Straits D．this deal could trigger a new round of arms race around the world