Which Security Method Would Be Best to Use If Extremely

Multiple Choice

Which security method would be best to use if extremely sensitive government information were stored on a hard drive that will no longer be used?

A) 1/0 rewrite software
B) Drill holes in the platters and smash the pieces with a hammer
C) Hold a magnet over each platter
D) Repartition the hard drive into multiple partitions using different file systems