题目内容：

 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