Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Input: [header] How to install windows xp on a windows vista computer [title] Consider if you really want to downgrade. [step] The most problematic issues with windows vista only apply to the original 2006 version of vista, not the newer sp1 version that comes with computers sold today. Windows 7 also doesn't have these issues. <sep> (A) Windows vista can upgrade the c: \ program files with newer version: xp recovery. [substeps] Xp recovery-this will restore the old version of windows 7 to the old version of windows vista 7. (B) Windows vista (7) also includes many features that enhance productivity, including instant desktop search, and features improvements in security. [title] Back up the files you want to save. (C) To put it another way, these common issues were developed by the internet later on, but computer configuration is no different today. Trying to install vista hardware without having to install hardware on the same of the windows vista computer. (D) You can downgrade from an earlier version of vista system by working on another version of vista. You will need to type in the manager name from the start menu or click " windows 8.1.
Output:
B