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.

Example Input: Article: We live in central Phoenix, near the canal . Every day I used to see a homeless old man and his scruffy little dog hanging out down there. I would tell my husband we should give him food for the little dog. It wouldn't have been a problem; we have our own "mini farm" of animals! But he would say "OK!" and then blow the idea off because of our business. Being in Phoenix, Arizona, you can just imagine how hot it gets here, but his winter was really chilly! I had just come from KFC with take-out food for dinner. As I was turning by the canal, the man and his dog were sitting right there all bundled up. Even the doggy had a coat on! Not even thinking about it, I pulled into the parking lot along the canal and piled up a plate of chicken with all the fixings for the man and his little buddy . I gave it to him with a soda and a bottle of water for the little dog. He said, "Thank you, sweetie. You are an angel." And there were tears welling up in his eyes! I told him he was so welcome, and then went home. When my husband dug into the KFC bag he asked, "Were you hungry, or what?" I told him what I did and he said, "Only you!" Then he told me I had done a good thing. A few weeks later, we were walking along the canal and found the man walking to me, with his little dog. He asked whether I would mind adopting the dog. With tears in eyes, he said it had gotten too hard for him to care for the dog. He added that he was planning on heading to Washington State but his dog wouldn't have been up to it, so he hoped to give it to me. "Only you! In this city, you are the only person I can believe in!" Now, every time I watch and pat the dog lying near the fireplace, I will remember the old man's words and wish him good luck.
Question: What did the author's husband feel when she told him what she had done?
Options: (A) thankful (B) delighted (C) indifferent (D) disappointed
Example Output: B

Example Input: Article: A small, white envelope has peeked through the branches of our Christmas tree for the past 10 years. It has no name, no identification, no inscription . My husband Mike hated Christmas. He hated the overspending and the crazy running around at the last minute for the gifts given in desperation because you couldn't think of anything else. So one year I searched for something special to give Mike. The inspiration came in an unusual way. Our son Kevin was 12 and was on the school wrestling team. Shortly before Christmas, there was a non-league match against a team of poor kids. They were dressed in ragged sneakers, and presented a sharp contrast to our boys in their golden uniforms and sparkling new wrestling shoes. As the match began, I was alarmed to see that the other team was wrestling without helmets . Their team obviously could not afford them. We beat them hands down . Mike shook his head sadly. "I wish just one of them could have won," he said. Mike loved kids and enjoyed coaching football and baseball. That's when the idea for his present came. That afternoon, I went to a sports store and bought a load of wrestling headgear and shoes. I sent them anonymously to the poor team. On Christmas Eve, I placed a small, white envelope on the tree, the note inside telling Mike what I had done and that this was his gift from me. Mike's smile was the brightest thing about Christmas that year. In the years that followed, I sent a group of mentally handicapped youngsters to a hockey game, and a check to a pair of elderly brothers whose home had burned to the ground the week before Christmas. The white envelope became the highlight of Christmas. Mike died last year, but on Christmas Eve I still placed an envelope on the tree. The next morning it was joined by three more. Each of our three children had placed a white envelope on the tree for their dad. Mike's spirit, like the Christmas spirit, will always be with us. By Nancy W. Gavin
Question: Why did Mike hate Christmas?
Options: (A) He found each Christmas was just the same as another. (B) He felt Christmas was ruined by constantly having to rush around. (C) He couldn't see the point in exchanging expensive gifts. (D) He felt the Christmas spirit was lost in commercialized gift buying.
Example Output: D

Example Input: Article: Some caterpillars' warning signals may have evolved from walking. A team, writing in the journal Nature Communications, reported that the hair-like structures the creatures use to make sounds evolved from legs. The team studied caterpillars which use these structures to communicate their ownership of leaves. This means the caterpillars are able to "tell" strangers to go away without risking injury in conflicts. "These are really interesting caterpillars," said Dr. Jayne Yack from Carleton University in Ottawa, Canada, who led the research. "They make signals using hair-like structures which are on their back ends." The caterpillars drag these structures across the leaf to make scraping sounds when strangers enter their "leaf shelters". "When they make this signal, the strangers leave," explained Dr. Yack. "It's like saying 'I'm here, get out of here --I already own this leaf'." The scientists looked at other species within the same group of caterpillars and created a "family tree" of the creatures. They used chemical markers to work out the relationship between the animals, showing which in the group were the more ancient species and which species evolved more recently. "Those more ancient species actually don't have these sound-producing structures. They have legs that they use to walk towards strangers," said Dr. Yack. These more ancient species, she explained, walk towards strangers and try to attack them. "They can kill each other in the conflicts," Dr. Yack added. She said that the evolution of the scraping show had allowed the caterpillars to solve their conflicts without fighting. "So our idea is that these signals actually avoid damage to both sides --they solve conflicts in a more 'friendly' way." The study also provides a map of an evolutionary path that many other biologists are exploring.
Question: What can we learn about caterpillars' warning structures from the text?
Options: (A) They have the same function as hair. (B) They are found in caterpillars' heads. (C) They are used to kill strangers. (D) They may have evolved from caterpillars' legs.
Example Output:
D