Detailed 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".
Q: [header] How to secure your website [title] Keep your website up to date. [step] Failing to update your website's software, security, and scripts when necessary is a sure way to allow intruders and malware to take advantage of your site. [substeps] This goes for patches from your website's hosting service as well (if applicable). <sep> (A) You may also be asked to downgrade for updates when your pages are accessed below. [title] Have fun! [step] Adding a domain name, a link to articles, and notifications, among other things can greatly boost your website's startup volume. (B) In the case of windows vista, for example, your website would be updated live once every two weeks during a regular business day. There are 2 main requirements, however: when to update your website and how often to update it. (C) Logs will generally put your website back in functional state. Pop-ups and anti-virus control will also motivate customers to keep their pages up to date. (D) Whenever an update for your website is available, install it as immediately as possible. You should also keep your site's certificates up to date.
A:
D