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". 

Ex Input:
[header] How to fall asleep if you are blind or visually impaired [title] Talk to your doctor. [step] If you are a blind or visually impaired person who is having trouble falling asleep, you should set up an appointment with your doctor. Ask your doctor to examine you for non-24, a sleep disorder that frequently affects visually impaired and blind people. <sep> (A) This can help you make a diagnosis and develop strategies to speed up your recovery. [substeps] Ask your doctor if sleep loss, depression, dyslexia, or dyslexia problems might be the issue and advice you need. (B) A doctor can make a diagnosis of a sleep disorder and understand your problem. Treatment of the sleep disorder based on the condition will help your doctor identify the underlying cause and decide how long it is necessary to treat you. (C) Your doctor may refer you to an optometrist or psychologist who has experience treating dementia or cognitive dysfunction. Your doctor may want to examine you in several places or diagnose various medical conditions. (D) [substeps] Non-24 is a disorder that affects your sleep-wake cycles and is common in blind people. People with non-24 have trouble falling and staying asleep at night, as well as extreme urges to nap during the day.

Ex Output:
D


Ex Input:
[header] How to address guests on escort cards [title] Address individual guests using their full name. [step] Guests who are planning on showing up by themselves need only be identified by their first and last name. Consider including the person's middle initial if they have a common name that may be shared with other guests. <sep> (A) [substeps] Consider the sender of each card or the recipient's first and last name. If they have a primary or joint name, include this with the full name. (B) [substeps] It's a good idea to use the name of the guest you want to address yourself. For example, if you want a library card (and you have permission to use the card), you can designate it " mr. (C) [substeps] For example, someone who lives alone may want to include " treasurer jones, " especially if their name is john smith. [title] Use text messages to identify guests based on their name. (D) [substeps] Unless your wedding is going to be an informal celebration, don't use abbreviations or nicknames-write " samantha " instead of " sam " and " william " rather than " bill. " an escort card for an unaccompanied guest might simply read: " john b.

Ex Output:
D


Ex Input:
[header] How to avoid internet addiction [title] Admit you are at risk of an addiction. [step] More and more people in the world are becoming addicted to the internet. You are not the only one with this problem, it is becoming more and more common and more and more well known. <sep> (A) This may seem like a good point but with this problem you may want to open up and talk to someone you trust. Even if you would not be comfortable having an anonymous conversation with someone you trust, it is still important to be clear that what you are experiencing is a form of internet addiction. (B) Do not be embarrassed; find others with the same problem and help each other beat it. [title] Set aside limited time for computer use. (C) Understand that it is okay to not be able to lose yourself to this activity but that life without internet addiction can be not sustainable. So suffering from this problem alone or with others entails a growing struggle in your life. (D) [substeps] Do not let internet addiction isolate you from friends and family. The fact that you are addicted to the internet may mean you need to decide to cut back on your daily and weekly choices.

Ex Output:

B