What is the result of the following command? dd if=/dev/zero of=/dev/hdd bs=512 count=1
A. Writes zeros in the first 512 bytes of the first hard disk block
B. Assigns the physical volume zero to the logical volume hdd
C. Overwrites an existing partition table
D. Creates a LVM partition of 512 blocks
E. Backs up the /dev/zero and /dev/hdd files