Why Was Greece Characterized as 'One of the Weakest Links

Why was Greece characterized as 'one of the weakest links in Europe's effort against terrorism'?

A) They are involved in massive amounts of state sponsored terrorism to protect their interests.
B) Over years of experiencing domestic terrorism, no members of any terrorist group were arrested by the Greek police.
C) Any credible terrorist threats made against Greece cause the Greek government to give in right away.
D) The Greek police force is very corrupt, so although the government would like to do something about it, they don't have any support.