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 people are arrested because ______.

A．they tried to smuggle surface-to-air missile into the US
B．they are involved with a terrorist attack
C．they are linked to al-Qaida terrorism
D．the weapons they tried to ship are for terrorist purpose