Which two parameters must be substituted to have the installer consume the answers in the install-answers file?

The correct parameters to be used for the installer to consume the answers in the install-answers file are the -A or -a flags. These parameters are designated for specifying the answers file during the installation process, enabling the installation to automatically read the required prompts and options specified in that file.

Using these flags ensures that the installer can properly interpret the expected configurations, thus streamlining the setup procedure. This capability is important for automation and consistency in deployment, as it allows for predefined responses to installation questions, which improves efficiency when installing Puppet or any associated components.

In this context, the other sets of parameters do not relate to the functionality of reading from the install-answers file, which is why they would not facilitate the intended purpose of automating the installation process using predefined responses.