There is no doubt ______ international cooperation is key to ______ with cybercrime, as Vinton Cerf has said that the problem of cybercrime is _______ huge that it requires UN to form a special agency to act as an international referee or steward

A.whether ; doing ; so

B.that ; dealing ; so

C.whether ; dealing ; such

D.that ; doing ; such

答案及解析： B

解析：

There is no doubt that毫无疑问，key to doing做某事的关键，so … that …如此……以致……，故选B。