TASK DEFINITION: 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". 
PROBLEM: [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.

SOLUTION: A

PROBLEM: [header] How to choose parts for a budget gaming pc [title] Pick out a processor (cpu). [step] Choose your cpu by looking at five things-performance, speed, cores, price, and durability. In general stick to i5 and ryzen 5 processors if you have a budget between $800 and $1500. <sep> (A) [title] Choose a processor that has a floppy protractor. [step] Floppy processors are these are tiny devices that only have one or two critical parts. (B) Since charging for a smartphone or gaming console has some extra impact, you should choose the fastest processor possible. A 350 watt processor will feel like a cheap one. (C) 8.2 ltv or blu ldb10 cores are other common cheaper choices. [title] Pick what you are absolutely listening to. (D) If you have a lower budget, buy a pentium, ryzen 3, or fx series processor. [substeps] Look at benchmarks and reviews for your selected cpu and all components you want to buy before you buy them to avoid ending up with a poor component.

SOLUTION: D

PROBLEM: [header] How to make a snake braid [title] Start with hair that's clean and dry. [step] The snake braid will work best with clean, healthy, and moisturized hair that's completely dry. In the shower or bath, wash your hair with a mild cleanser to remove dirt, oil, and styling products. <sep> (A) Do not use very much, as extra volume on your hair could make it look cakey instead of healthy. [title] Unravel the hair as the braids usually do. (B) Use a comb to gently detangle the hair that's tangled. [substeps] If you need extra help removing hair in a spiral braid, purchase a long plastic comb. (C) [substeps] Condition your hair with your favorite conditioner, and after you rinse it out, towel dry your hair and let it air dry. If you're in a rush and need to blow dry your hair, apply a heat-protecting product beforehand. (D) [substeps] Take care to avoid pulling your hair under the towel when you wash it. Also, don't submerge the towel in water because you don't want the water to " smudge " the hair.

SOLUTION:
C