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 man walks on stilts into a park. turns to his right <sep> (A) and walks a tan bicycle towards a paved path with people walking on it. (B) and walks up to a platform. (C) to meet someone coming up the path. (D) and walks pass a row of benches.

Ex Output:
D


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 apply concealer [title] Choose your shade. [step] Concealer comes in a variety of shapes and colors, so analyze your skin first to determine what you need. Are you trying to cover up acne? Under eye circles? Scars or birthmarks? Once you determine what you want to conceal, you can choose the appropriate color and shade. <sep> (A) [substeps] For example, you may choose shades of green for lighter skin tone and a shade of black for darker skin tone. If you have acne, use a shade of green that is twice as dark. (B) [substeps] If you are applying concealer under eye circles, go with black or gray. These colors will make your skin appear smaller, which will still help the concealer to stick to the skin. (C) Use the color wheel to help you figure out which color corrector to use. Match the opposite color on the color wheel to cancel it out. (D) Here are some classic shades to choose from : [substeps] Red, rose gold, cobalt brown, blond, or green. Ivory, reddish brown, amber, purple, indigo, blond, olive, copper, jewel purple.

Ex Output:

C