Explanation/Reference:
In a warm recovery environment the farm is built and virtual machines are running and updated. Recovery includes attaching content databases, provisioning service applications, and crawling content.
Incorrect:
Not B: The State Service is a shared service that is used by some Microsoft SharePoint Server components to store temporary data across related HTTP requests in a SQL Server database. In SharePoint Server 2010, the State Service is required by InfoPath Forms Services (including out of the box and custom workflow forms), the SharePoint Server 2010 Chart Web Part, and certain Microsoft Visio 2010 scenarios that do not use Microsoft Silverlight 3.
Not E: Word Automation Services provides unattended, server-side conversion of documents into formats that are supported by the Microsoft Word client application.