A cluster using IPAT via IP aliasing has four adapters. Normally there are several resource groups that have a total of four service IP labels. When two of the adapters fail， what happens？（）

A. The resource group containing the IP labels changes to an "offline" state.
B. The IP service labels of the failed adapters relocate the surviving adapters.
C. Nothing because the resource groups wait for the adapters to become active again.
D. The resource groups containing the IP labels of the failed adapters migrate to a backup node.