Your company has client computers that run Windows XP Professional.   You are planning to install Windows 7 Enterprise on the existing client computers.   You have the following requirements：   Migrate user data and operating system components.  Encrypt and password-protect the migration store.   You need to design a user state migration strategy that supports the requirements. What should you do？（）

• A、Use a hard-link migration store
• B、Use a compressed migration store
• C、Perform an offline migration by using Windowsold
• D、Perform an offline migration by using Windows PE