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".
Q: [header] How to repair a word document [title] Back up your document. [step] Even if your file is corrupt, having a duplicate means you still have a chance to recover the information in it if you should accidentally destroy the file in trying to repair it. Put this backup on a flash drive or other removable media. <sep> (A) You'll end up having to pay for the removable media, but you won't have to pay for anything for several more months. [title] Download the wordpress virtualization in the sources section of this article. (B) [title] Reformat your document in a new format. [step] Some formats change too quickly for you to reformat it properly. (C) [title] Make repairs after the expiration of the document. [step] If you need to replace an existing document in order to recover files in a new one, you'll want to save the document by backing it up with a backup disc. (D) [substeps] If you have a previously saved version of the document, you may want to back it up and then open it on the same computer or another computer. If you've made few changes from the previous version to the current one, you may find it easiest to recreate the changes.
A:
D