Preparing an Image Drive to Copy Files to Is the First

Preparing an image drive to copy files to is the first step in Linux forensics. For this purpose, what would the following command accomplish? dcfldd if=/dev/zero of=/dev/hda bs=4096 conv=noerror, sync

A) Fill the disk with zeros
B) Low-level format
C) Fill the disk with 4096 zeros
D) Copy files from the master disk to the slave disk on the secondary IDE controller