To prevent cybercrime more efficiently, it is important to make new laws and create international standards for them similar to ______ concerning international airspace.

A. that　　　　　 B. what　　　　　 C. one　　　 D. those

To prevent cybercrime more efficiently, it is important to make new laws and create international standards for them similar to________concerning international airspace.

1. A.
   that
2. B.
   what
3. C.
   one
4. D.
   those

To prevent cybercrime more efficiently, it is important to make new laws and create international standards for them similar to________concerning international airspace.

       A．that   B．what  C．one   D．those

To prevent cybercrime more efficiently, it is important to make new laws and create international standards for them similar to________concerning international airspace.