You need to design a security strategy for the Web folders and files created by the consultants and the internal Web developers. What are two possible ways to achieve this goal？（）

• A、Require the internal Web developers to use Telnet with Kerberos authentication. Require the consultants to use L2TP with IPSec
• B、Require the internal Web developers to use Encrypting File System （EFS） over Web Distributed Authoring and Versioning （WebDAV）. Require the consultants to use Microsoft.NET Passport authentication with Security Level 0
• C、Require the internal Web developers to use Web Distributed Authoring and Versioning （WebDAV） over SSL.Require the consultants to use WebDAV over SSL
• D、Require the internal Web developers to use L2TP with IPSec. Require the consultants to use Encrypting File System （EFS） over Web Distributed Authoring and Versioning （WebDAV）
• E、Require the internal Web developers to use Web Distributed Authoring and Versioning （WebDAV） over SSL.Require the consultants to use L2TP with IPSec