What is true about the file /etc/localtime?

What is true about the file /etc/localtime?
A . It is a plain text file containing a string such as Europe/Berlin
B . It is created and maintained by the NTP service based on the location of the system’s IP address.
C . It is a symlink to /sys/device/clock/ltime and always contains the current local time.
D . After changing this file, newtzconfig has to be run to make the changes effective.
E . It is either a symlink to or a copy of a timezone information file such as /usr/share/zoneinfo/Europe/Berlin.

Answer: E