Explanation
When attempting to change the root account's password, the CPM will log in to the system as the logon account, run the su command to log in as root, and then change root's password. This is because the logon account is used to initiate sessions to machines that do not permit direct logon, such as Unix systems that restrict root access. When a logon account is associated with a privileged account, it will be used to log onto the remote machine and then elevate itself to the role of the privileged user. As different types of machines might have different logon prompts or elevation commands, the CPM can use the AutoLogonSequenceWithLogonAccount parameter to define the logon process and the elevation to the privileged account. This parameter contains regular expression prompts and responses that define the logon process and subsequent activities. The regular expressions can include dynamic values that the CPM reads from the account properties, user parameters, or client-specific parameters1. For example, the following is a possible AutoLogonSequenceWithLogonAccount parameter for a Unix platform:

This parameter instructs the CPM to log in to the system as the logon account, enter the logon password, run the su - command to switch to the root user, enter the logon password again, run the change command to change the root password, exit the root session, and exit the logon session1.
The other options are not correct, as follows:
* A. Log in to the system as root, then change root's password. This option is not possible, because the root account cannot be used for direct logon. The logon account is associated with the root account to enable the CPM to access the system and change the password1.
* B. Log in to the system as the logon account, then change root's password. This option is not effective, because the logon account does not have the permission to change the root's password. The logon account needs to elevate itself to the root user by using the su command before changing the password1.
* D. None of these. This option is not valid, because there is a correct answer among the choices.
References:
* 1: Logon Accounts for SSH and Telnet Connections