Locking a Blackberry Does Not Provide Strong Data Protection

Locking a Blackberry does not provide strong data protection.Why?

A) Security company IronKey reported that password cracking software can quickly copy the contents of a BlackBerry's SD card and crack a 4-digit PIN in 30 seconds.
B) Password cracking software can crack security on a handheld device without alerting the owner that the device's security has been compromised.
C) password cracking software can store log-in information for the cracked handheld,allowing a hacker to access the hacked device again,unless the user changes the password.
D) All of the above.