Where can you change the default learning mode period?

The correct choice for changing the default learning mode period is found in computer groups. This setting is typically designed to allow for customized configurations that can be applied to groups of systems rather than adjusting settings on an individual basis. By allowing changes at the group level, organizations can streamline the management of multiple devices, ensuring a consistent learning mode period across all computers within that group.

In context, the other options do not relate directly to changing the learning mode period as effectively as computer groups do. System settings generally encompass broader configurations affecting the entire platform or system architecture rather than specific learning modes. User preferences may provide options for individual customization, but those preferences usually do not extend to systemic changes like learning periods. Account settings typically manage user rights and credentials rather than educational parameters. Therefore, computer groups serve as the most logical and effective choice for adjusting the default learning mode period in a way that is scalable and manageable.