When Booting from the Hard Disk, a Computer Successfully Loads

When booting from the hard disk, a computer successfully loads the Linux kernel and initramfs but hangs during the subsequent startup tasks. The system is booted using a Linux based rescue CD to investigate the problem. Which of the following methods helps to identify the root cause of the problem?

A) Using the dmesg command from the rescue CD's shell to view the original system's boot logs. Using the dmesg command from the rescue CD's shell to view the original system's boot logs.
B) Investigating the file /proc/kmsg on the computer's hard disk for possible errors. Investigating the file /proc/kmsg on the computer's hard disk for possible errors.
C) Investigating the file /var/log on the computer's hard disk for possible errors. /var/log
D) Using chroot to switch to the file system on the hard disk and use dmesg to view the logs. Using chroot to switch to the file system on the hard disk and use to view the logs.
E) Rebooting again from the hard drive since the system successfully booted from the rescue CD.