Which statement about POAP temporary licensing is true?

The `license grace-period` command is used on Cisco Nexus devices, including those provisioned by POAP, to manage temporary licenses. This command can activate, extend, or display the status of a grace period license, which allows the device to function fully for a set duration (e.g., 90 days) before a permanent license is required.

The `license install` command is used to apply a permanent license file to the device, not to invoke a temporary grace period license.

While a grace period is often automatically enabled and might be valid for 90 days, the question specifically asks how it is *invoked*, and the `license grace-period` command provides direct administrative control over this feature.

The duration of the grace period can vary (often 90 days), but more importantly, the `license grace-period` command is the mechanism for invoking and managing it, not automatic enablement alone.