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.

Ex Input:
Article: Like a growing number of young women in Vietnam's northern part city of Haiphong, Pham Thi Hue was infected with HIV by her husband, one of the town's many drug users. But instead of being shamed into silence, as Vietnamese with HIV and AIDS are, the 25-year-old tailor and mother of one went public, appearing on television and at conferences. Her business suffered and her neighbors insulted her, but Hue has now become the public face of Mothers and Wives, an HIV/ AIDS support group established in Haiphong by a Norwegian nongovernmental organization and her neighborhood's People's Committee. Last year, she founded a smaller group named after a local flower. People who need advice on treatment or help preparing bodies for burial can dial a hot line and get assistance from able and sympathetic HIV victims. "We gather to support each other," Hue says. "When we are sick, what we need most is encouragement and comfort from people who understand our situation and are willing to share our happiness, as well as our sadness." On a hot and damp night last month, Hue welcomed into her small home a very thin woman, also a tailor, who was HIV positive. The woman tearfully told Hue that she had not told anyone about her condition, fearing that she would lose customers and that her daughter would be insulted at school. Hue became the wise elder, offering medical and personal advice.
Question: What did Pham Thi Hue do after she was infected with HIV?
Options: (A) She kept silent (B) She worked as usual (C) She stayed at home and cried every day. (D) She went public and gave help to others.

Ex Output:
D

Ex Input:
Article: Humans and many other mammals have unusually efficient internal temperature regulating systems that automatically maintain stable core body temperatures in cold winters and warm summers. In addition, people have developed cultural patterns and technologies that help them adjust to extremes of temperature and humidity . In very cold climates, there is a constant danger of developing hypothermia , which is a life threatening drop in core body temperature to below normal levels. The normal temperature for humans is about 37.0degC. However, differences in persons and even the time of day can cause it to be as much as 6degC higher or lower in healthy individuals. It is also normal for core body temperature to be lower in elderly people. Hypothermia begins to occur when the core body temperature drops to 34.4degC. Below 29.4degC, the body cools more rapidly because its natural temperature regulating system usually fails. The rapid decline in core body temperature is likely to result in death. However, there have been rare cases in which people have been saved after their temperatures had dropped to 13.9-15.6degC. This happened in 1999 to a Swedish woman who was trapped under an ice sheet in freezing water for 80 minutes. She was found unconscious, not breathing, and her heart had stopped beating, yet she was eventually saved despite the fact that her temperature had dropped to 13.7degC. In extremely hot climates or as a result of uncontrollable infections, core body temperatures can rise to equally dangerous levels. This is hyperthermia. Life threatening hyperthermia typically starts in humans when their temperatures rise to 40.6-41.7degC. Only a few days at this extraordinarily high temperature level is likely to result in the worsening of internal organs and death.
Question: Why can humans keep stable body temperatures in different seasons?
Options: (A) Because their bodies are unusually efficient. (B) Because they experience different climates. (C) Because they can adjust to cultural patterns and technologies. (D) Because they have internal temperature regulating systems.

Ex Output:
D

Ex Input:
Article: Elephants are the only species on the earth known to have death ritual besides man. They show a strong interest in the bones of their own kind.They are often seen gently touching the bones with their trunks and feet while remaining very quiet.Sometimes elephants completely unrelated to the dead will still visit their graves. Elephant researcher Meredith recalls something in his book about a typical elephant death ritual.The entire family of a dead elephant,including her young baby,were all gently touching her body with their trunks,trying to lift her. The elephant herd were all rumbling :The baby elephant was even observed to be weeping and made sounds that sounded like a scream,but then the entire herd fell incredibly silent.Then they began to throw leaves and dirt over the body and broke off tree branches to cover her.They spent the next two days quietly standing over her body.They sometimes had to leave to get water or food,but they would always return. Events of elephants behaving this way around human beings are common throughout Africa. On many occasions,they have buried dead or sleeping humans or helped them when they are hurt. An old woman fell asleep under a tree.When she woke up,there was an elephant standing over her,gently touching her.She kept very still because she was frightened.As other elephants arrived,they began to scream loudly and buried her under branches.She was found the next morning by the local people,unharmed. George Adamson also recalls when he shot all elephant from a herd that kept breaking into the farmers'gardens.George gave the:elephant's meat to 1ocal men and then dragged the rest of the body miles away.That night,the other elephants found the body,took the leg bones,returned them to the exact spot the elephant was killed,and made the death ritual.
Question: Elephants touch the bones of their own kind to _ .
Options: (A) express sorrow at the death (B) search for the hunter (C) clean their trunks and feet (D) call for other elephants

Ex Output:
A