Which of the following statements is correct when talking about /proc/?

Which of the following statements is correct when talking about /proc/?
A . All files within /proc/ are read-only and their contents cannot be changed.
B . All changes to files in /proc/ are stored in /etc/proc.d/ and restored on reboot.
C . All changes to files in /proc/ are immediately recognized by the kernel.
D . All files within /proc/ are only readable by the root user.

Answer: C