You deploy mobile devices that run Microsoft Windows Mobile 5.0. Company security policy requires an authentication process that is stronger than a user name and password combination. You need to ensure that Microsoft ActiveSync sessions use an authentication process that meets the company security policy. What should you do？（）
- ADeploy a two-factor authentication process.
- BDeploy a single-factor authentication process.
- CDeploy a simple PIN policy for the Windows Mobilebased devices.
- DDeploy a complex PIN policy for the Windows Mobilebased devices.