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:
A group of people are in a gym playing dodgeball. a logo <sep> (A) appears and clears the tiles. (B) representing dartmouth appears, followed by other words. (C) appears on the screen. (D) shows up with arrows.

Ex Output:
C


Ex Input:
[header] How to stay up late without electronics [title] Drink caffeine. [step] Caffeine blocks neurotransmitters in your brain that make you sleepy. When you start to feel drowsy, reach for a cup of coffee or a soda. <sep> (A) Remember that caffeine loses its effectiveness with overuse. Try to save it for when you really need it. (B) Your body will start shutting down caffeine when you're outside and keep you awake by doing what it is meant to do. It can help you stay awake long enough to go to bed. (C) Though caffeine will not give you energy right before sleep, it will trigger the natural sleep signal that draws us into the world right before it hits. An caffeine-rich beverage will wake you up more, making your sleep better. (D) Coffee is the source of human sleepiness so drinking coffee or another caffeinated beverage before bedtime is important. Even an extra pill is a key lubricant.

Ex Output:
A


Ex Input:
[header] How to eat out with diabetes [title] Time your meal to coincide with your insulin or medication. [step] It's best to eat at your normal meal times so that your blood sugar remains in the proper range. Tell your meal companions what time works best for you. <sep> (A) [title] Uneat if you notice any feeling like you're not eating. [step] As you eat your meal, focus on eating slowly. (B) [substeps] You should always follow up with your doctor when timing your meals. This helps your body understand that you're on their payroll. (C) [substeps] If you're diabetic you may not eat six meals a day. However, it's okay to eat six meals if you have diabetes, as long as you eat enough so that you can monitor your blood sugar. (D) [substeps] You could say, " my normal dinner time is 6:00 p.m., so i'll need to eat around that time to keep my blood sugar stable. " schedule work lunches during your normal lunch hour.

Ex Output:

D