Which of the following characters in the password field of /etc/passwd is used to indicate that the encrypted password is stored in /etc/shadow?

While an asterisk `*` can appear in the password field, it typically indicates that the account is locked or disabled, not that the password is in `/etc/shadow`.

A hyphen `-` is not a standard character used in the password field to indicate shadow passwords.

The character 's' is not used as a placeholder for shadow passwords in `/etc/passwd`.

When shadow passwords are enabled, the 'x' character is placed in the password field (the second field) of the `/etc/passwd` file for each user. This 'x' explicitly indicates that the user's encrypted password hash is stored separately in the `/etc/shadow` file, enhancing security by making `/etc/passwd` world-readable without exposing password hashes.