instruction:
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". 
question:
[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.
answer:
D


question:
[header] How to convert miles to meters [title] Convert statute (or land) miles to meters. [step] There are 0.000621371192237 miles in 1 meter. There are 1 , 609.344 meters in one mile. <sep> (A) You can also convert miles to meters by substituting inches with miles. [substeps] For example, when a marketed car is covered in miles miles, it is known as a nautical miles! . (B) [title] Understand that the difference between miata and philips is that the length of the number obtained were identical. [step] The number makes up 5 of the cube kilometers in a specific measure. (C) [substeps] Although there are different definitions of miles (such as a nautical mile), this conversion refers to a " statute mile, " sometimes called a " land mile. " that's the common way you would measure length and distance in the united states. (D) By earning " cos " (the number of miles per kilometer), you will earn 1609.6 miles in 296 meter increments during your monthly tillings and potty breaks. [substeps] The number of miles you can view by using the " lines " locator tool will vary depending on your region or the types of distances you find in the map.
answer:
C


question:
[header] How to level a camper [title] Pick a flat place to park. [step] Try to find a parking spot that is as flat as possible. Leveling is meant to compensate for minor ground unevenness, so parking on a slope will still be uncomfortable and unsafe. <sep> (A) [substeps] If the ground slopes to the camper's side, reposition the camper so the ground slopes towards the front or back end. [title] Clear out the area before leveling the camper. (B) Parking on a slope will also make it more difficult for you to get used to the trees and terrain changes that will make leveling difficult. [substeps] Steep slopes generally have a greater risk of falling, which makes them ideal for leveling flat. (C) [title] Call a friend if you are unable to access the area where you plan to start leveling. [step] This will ensure your camper will be level within the area and won't cause trouble. (D) Parked parking is safer and smoother, in addition to making sure your camper is safe for long-term use. [substeps] Some campers may have great reason to have difficulty leveling their camper.
answer:

A