Which of the following commands overwrites the bootloader located on /dev/sda without
overwriting the partition table or any data following it?
A.
dd if=/dev/zero of=/dev/sda bs=512
B.
dd if=/dev/zero of=/dev/sda bs=512 count=1
C.
dd if=/dev/zero of=/dev/sda bs=440 count=1
D.
dd if=/dev/zero of=/dev/sda bs=440