In What Way Has the Internet, and Consequently Cyber-Crime, Presented

In what way has the internet, and consequently cyber-crime, presented significant challenges to policing?

A) It has allowed for better sharing of records and data between police forces
B) Criminals can look up policing strategies and try to get around them
C) It has shifted criminal activity from geographical spaces to virtual, in which the perpetrators may be located anywhere
D) It has shifted the nature of policing away from offline crime