Given the task definition and input, reply with output. 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".

[header] How to start a secret diary [title] Buy a notebook that would appear as if you would use it for school. [step] Even write school notebook, or something like that. The biggest mistake you could make when buying a diary is getting a pink frilly, lacy notebook with " diary " written in big bold letters on the front. <sep> (A) That's why a pink case or notebook is a good name for a fake diary. Look for the " school notebook " label on your school's website, on the back, or on the bottom of your school's page. (B) This will make your diary super obvious and waterproof. [title] Put your school notebook somewhere you know you won't be tempting to grab and peek in it. (C) Try using a school composition notebook or a spiral notebook. [title] Never tell anyone that you have a diary. (D) Nobody likes pink notebooks when it comes to the school administrators, and it's no good sneaking a diary out of the office/school if your homework is late and you are the only person going to see it. [title] Make sure your school has a blue notebook.
C