What can administrators manage through the 'Admin Center' in Smartsheet?

Administrators can manage users and account settings through the 'Admin Center' in Smartsheet, making this option the correct choice. The Admin Center serves as a centralized hub for managing various account-level settings, including user management, which allows administrators to add, modify, or remove users. They can also adjust overall account settings that affect all users within the organization, such as security settings and integrations.

Managing users is critical for maintaining the organization's workflow and ensuring that everyone has the appropriate access rights tied to their roles. As for account settings management, it includes defining settings that govern the behavior of Smartsheet across the organization, reinforcing structured and secure use of the platform.

The other options focus on aspects that do not fall within the scope of the Admin Center. Template designs and layouts pertain more to individual project management or sheet-specific customization rather than administrative control. Task durations across projects relate to project planning and scheduling, which are managed within individual sheets or projects rather than the overarching administration level. Lastly, user permissions can indeed be adjusted, but the Admin Center allows for broader permissions management across the entire account, rather than limiting it to individual sheets.