Definition: 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 restore dll files on your computer [title] Missing dll files that somehow disappear can cause your computer to act in strange ways, such as not shutting down properly. [step] Run a system disk scan in the norton antivirus suite. For instance norton has a tool called " windoctor " that makes repairs automatically. <sep> (A) [title] Burn dll files in a safe location if they disappear. [step] Dll files are damaged in the scanning process. (B) [title] Notice when your case communications is missing. [step] Sometimes, when your case communications on your computer become unreadable, as administrator you can notice that the case communications are missing. (C) [title] Do a complete reboot of your computer. [step] After reboot you are looking at dll files that are already in their original packaging. (D) It is suggested that if you remove norton for another free antivirus program, they retain norton utilities/windoctor and speed disk for defragging. [title] Always run a scan on anything you download before you open it.
Output:
D