Besides,they [terrorists] don' t have access to the knowledge[to build an atomic bomb].

Besides,they [terrorists] don' t have access to the knowledge[to build an atomic bomb].

A.Besides, it is none of their business to do that.

B.Besides, they are not knowledgeable enough to do that.

C.Besides, they can't get the necessary information.

D.Besides, it is difficult for them to get an opportunity.

正确答案是C