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 geolocation of the system’s IP address.
C .  It is a symlink to /sys/device/clock/ltime and always contains the current local time.
D .  It is either a symlink to or a copy of a timezone information file such as
/usr/share/zoneinfo/Europe/Berlin.

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Answer: D