The correct answer is D. mkkickstart.
mkkickstart is a command-line tool that creates a kickstart file, which is a text file that contains instructions for installing Red Hat Enterprise Linux. A kickstart file can be used to automate the installation of Red Hat Enterprise Linux on multiple computers with identical hardware.
bzimage.img is a compressed image file that contains the Linux kernel. tar is a command-line tool that can be used to create and extract archives of files. ghost is a command-line tool that can be used to create and restore disk images. None of these tools are used to automatically install Red Hat Enterprise Linux on identical hardware.