In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Input: Consider Input: Article: Many people cannot start their day without first having a cup of coffee or tea.These drinks help them think clearly and feel more awake.This is because of caffeine,which helps to give a jump start to the nervous system.Now,a report says it may also boost long-term memory. Mike Yassa is a neurobiology professor.He and other researchers wanted to know if caffeine could improve a person's memory.He explains,"After you learn anything,it takes some time for that memory to strengthen.And over the first 24 hours is actually where most of the forgetting happens.So that is where we wanted to intervene with caffeine and see if we can help reduce this forgetting." They took 160 caffeine-free people and showed them pictures of everyday objects. These people were asked if the objects could be found inside the house, or outdoors.Then some of the subjects were given a caffeine pill.The others were given a placebo--a pill containing nothing. 24 hours later,the subjects were shown the exact same images from the day before.They were also shown images with slight differences,and some completely new images. Both groups correctly identified the exact same and completely new pictures.But those who took the caffeine pill were better at spottingthe pictures that were slightly different. Professor Yassa says their answers helped to show the effects of caffeine on memory. And we find that if they are on caffeine they are much more likely to make the right decision." The amount of caffeine the researchers used in the study was similar to one cup of strong coffee.The researchers did not see any improvement to memory from smaller doses of caffeine or when it was given an hour before viewing the images.
Question: What is the focus of the text?
Options: (A) Caffeine can make people addicted. (B) Caffeine can make people energetic. (C) Caffeine can improve long--term memory. (D) Caffeine can make people feel comfortable.

Output: C

Input: Consider Input: Article: When it comes to human resources, hiring highly-skilled staff is not usually enough for a company to function successfully. Besides the knowledge in their particular fields, employees must always have additional skills-----those of co-operation. In the case that work tasks can only be carried out by communicating with people, accepting common decisions, solving problems, sharing information and helping one another, teamwork skills are important. While some jobs may require talent, the ability to work as a team is learned. There are no complicated formulas ; you don't need to have any special qualities or exceptional mental abilities. Individuals can be effective as a team if they have developed certain behaviors or habits of communication. Many companies, clubs and organizations use team building activities. Team building activities may include a number of teamwork elements. They are aimed at encouraging active participation in task accomplishment while all members have their roles as individuals and are able to co-operate towards a common goal as a team. Many team building activities focus on problem solving and discussing team issues; thus argument as a way to common consensus is encouraged. Team building activities often involve recognition and identification of team member skills, talents, knowledge, and experiences which allow the team members to learn more about each other and fully utilize those skills where appropriate . Many team activities are focused on developing keys to trust during challenging times.
Question: In the author's opinion, which of the following is important for a company to be successful?
Options: (A) Specialized knowledge. (B) Highly-skilled staff. (C) Exceptional talent. (D) Teamwork skills.

Output: D

Input: Consider Input: Article: Here are some tips on how to keep you,your belongings and your money safe during traveling. After all,it'd be a shame to spend all that time finding the best price for your trip,only to lose your cash and credit cards to a thief. Don't let others know that you are new here. You're a tourist. You know that,but you don't want anybody else to know that. Don't unfold your big map on a busy corner. Don't ask strangers on the street for directions. Learn your route ahead of time,and step into a business for directions whenever possible. Avoid flashing your Lonely Planet guidebook around,or publicly referring to your language dictionary when traveling abroad. Keep your friends close and your money closer. A lone traveler equals easy pickings for a seasoned criminal. If you are traveling alone,try to hide that fact. Stick with groups whenever possible and keep information sharing with chatty cab drivers and the like to a minimum. Another thing you don't want to advertise:where you keep your money. A fanny pack may be convenient,but it means "I'm not from around here!" If you have a purse,keep it close to your body,preferably under an item of clothing like a jacket or a sweater so that thieves can't steal it. Be sure that your wallet is in a securely fastened pocket. Or go like 007 with a hidden money belt. How cool is that? Be careful,even in your hotel room. Never blindly answer a knock at your door. If the knocker identifies himself as a hotel employee,call the front desk to confirm. Always make sure your hotel door completely closes when entering or exiting. Don't leave your valuables lying around when you leave for the day. That hotel safe is there for a reason!
Question: Why shouldn't tourists wear a fanny pack?
Options: (A) Because it shows that you are not a person around here. (B) Because it is not convenient. (C) Because it can't be hidden under your jacket. (D) Because it can't hide money.
Output: A