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 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:
A man is pushing a lawn mower through the grass. A child is standing next to him pushing a toy lawn mower. they <sep> (A) speed past a car in the street. (B) pass other kids on the lawn mower. (C) move up and down the lawn on the mower. (D) give each other a high five.

Ex Output:
D


Ex Input:
[header] How to create a christmas wreath [title] Start by preparing the elements that will form the basis of the wreath around the oasis ring. [substeps] Cut small sprigs of blue pine, removing the bottom 2 cm/1 inch of needles. You can either trim the needles with scissors or remove them with your fingers. <sep> (A) Cut 30 sprigs of berried ivy. [title] Place the base wreath elements onto the oasis ring. (B) You can cut small shoots from similar trees if you wish, or pick up branches if necessary. Cut twice or three times at the base of the tree. (C) Remove the ribbon and tape if they are too long for the wreath. You can also use color-safe silk ribbon. (D) Another method is to cut strings of household lights. Stand the string approximately 6-10 inches from the end of the oasis ring.

Ex Output:

A