Deve ser inserido a conta de logon na conta/plataforma da conta root

it always a best practices from CyberArk Vendor or Principle. When cannot direct login with Using Root or others high privilege ID Logon Account/ID will be the secondary login ID, then only others ID can login.

The question mentioned password management. Its a tricked question..

C. Configure the UNIX platform to use the correct logon account is the correct answer. This is because the logon account is the secondary account that the CPM uses to first log into the UNIX system before switching to the root account for password management. The logon account provides the CPM with the necessary permissions to manage the root account's password without having direct root access.

C is correct

Configure the UNIX platform to use the correct logon account.

The logon account can be defined on the target account level or on the platform level, making it available to all accounts associated with the platform. Note: Logon accounts can also be defined for PSM and PSM for SSH connections. In this case, they can be retrieved from the account level only. https://docs.cyberark.com/Product-Doc/OnlineHelp/PAS/13.0/en/Content/PASIMP/Linked-PAS-Accounts.htm#Overview

C is the correct answer. must be logon account for UNIX.