Which of the following statements is true regarding systemd timer units?

Which of the following statements is true regarding systemd timer units?
A . Timer units can only be defined within a service unit’s file.
B . The command executed by the timer is specified in the timer unit’s [Cmd] section.
C . A dedicated system service, systemd-cron, handles the execution of timer units.
D . Timer units only exist in the system scope and are not available for users.
E . Each systemd timer unit controls a specific systemd service unit.

Answer: E