Each entry in a crontab must end with which of the following characters?

A tab character is used to separate fields within a crontab entry (e.g., minute, hour, day), but not to terminate the entire entry.

A space character is used as a field separator, similar to a tab, but does not serve as an entry terminator.

A backslash is typically used for line continuation or escaping special characters in shell commands, not for terminating crontab entries.

In `crontab` files, each command line defining a scheduled job must be terminated by a newline character. This ensures that the cron daemon correctly identifies and processes each distinct entry, as it uses the newline as a delimiter to separate individual cron jobs.