You are given a paragraph, a question and some answer options (associated with "A", "B", "C", "D", etc.) You need to list all the correct answer options with their associated letters (e.g. "A" can be a valid answer). Note that sometimes, more than one option can answer the question correctly and completely. In those cases, please generate all such options separated by a comma (e.g. "A, B" is a valid answer). Do not generate anything else apart from one or more of the following characters: 'A', 'B, 'C', 'D', etc.

Example Input: Paragraph- Sent 1: Alexander Sergeyevich Pushkin (/'pUSkIn/; Russian: Aleksandr Sergeevich Pushkin, tr.
Sent 2: Aleksandr Sergeyevich Pushkin; IPA: [aljI'ksandr sjI'rgjejIvjItc 'puskjIn]; 6 June [O.S. 26 May] 1799 - 10 February [O.S. 29 January] 1837) was a Russian author of the Romantic era who is considered by many to be the greatest Russian poet and the founder of modern Russian literature.
Sent 3: Pushkin was born into Russian nobility in Moscow.
Sent 4: His matrilineal great grandfather was Abram Gannibal, who was brought over as a slave from what is now Cameroon.
Sent 5: Pushkin published his first poem at the age of fifteen, and was widely recognized by the literary establishment by the time of his graduation from the Tsarskoye Selo Lyceum.
Sent 6: While under the strict surveillance of the Tsar's political police and unable to publish, Pushkin wrote his most famous play, the drama Boris Godunov.
Sent 7: His novel in verse, Eugene Onegin, was serialized between 1825 and 1832.
Sent 8: Notoriously touchy about his honour, Pushkin fought as many as twenty-nine duels, and was fatally wounded in such an encounter with Georges-Charles de Heeckeren d'Anthes.
Sent 9: Pushkin had accused D'Anthes, a French officer serving with the Chevalier Guard Regiment of attempting to seduce the poet's wife, Natalya Pushkina.
Question: At what age did Pushkin begin to serialize Eugene Onegin? (A) 15 (B) 29 (C) He began to serialize it when he was 26 years old.
Example Output: C.

Example Input: Paragraph- Sent 1: Joe's parents are farmers and they have a huge farm with cows, chickens, and ducks.
Sent 2: Joe loves the farm and all the things he gets to play around and play on.
Sent 3: One day, Joe's father told him not to get near a tractor that was sitting in the field.
Sent 4: His father was worried that Joe would climb on it and hurt himself.
Sent 5: Joe went out to the field and was feeding the horses and cows.
Sent 6: When he was done, he saw the tractor his father told him not to get near.
Sent 7: He knew that climbing on the tractor wouldn't hurt anything, so he did.
Sent 8: He climbed on to the seat and sat there.
Sent 9: Then, he pretended he was his father and pretended that he was driving the tractor.
Sent 10: Joe's father saw him playing on the tractor and called for him.
Sent 11: Joe heard his father calling for him and got off the tractor really fast.
Sent 12: When he did that, he fell off and hurt his arm.
Sent 13: Joe was in pain and his father came running to check on him and picked him up and sat him on a bench and asked him why he did that.
Sent 14: Joe looked at his father and said, "I wanted to be like you."Sent 15: Joe's father gave him a hug and asked him if he wanted to ride with him on the tractor.
Sent 16: Joe did and after he got a bandage on his arm, he and his father rode in the field on the tractor.
Question: What had he just finished doing when he saw the tractor (A) Playing around the farm (B) Feeding the chickens and ducks (C) Talking to his father (D) Feeding the horses and cows.
Example Output: D.

Example Input: Paragraph- Sent 1: We need natural resources for just about everything we do.
Sent 2: We need them for food and clothing, for building materials and energy.
Sent 3: We even need them to have fun.
Sent 4: Table 2.1 gives examples of how we use natural resources.
Sent 5: Can you think of other ways we use natural resources?
Sent 6: Use Vehicles Resources Rubber for tires from rubber trees Steel frames and other metal parts from minerals such as iron Example iron ore Electronics Plastic cases from petroleum prod- ucts Glass screens from minerals such as lead lead ore Use Homes Resources Nails from minerals such as iron Timber from trees Example spruce timber Jewelry Gemstones such as diamonds Minerals such as silver silver ore Food Sunlight, water, and soil Minerals such as phosphorus corn seeds in soil Clothing Wool from sheep Cotton from cotton plants cotton plants Recreation Water for boating and swimming Forests for hiking and camping pine forest Some natural resources are renewable.
Sent 7: Others are not.
Sent 8: It depends, in part, on how we use them.
Question: What are other uses of natural resources? (A) Clothing (B) Building materials (C) Making rubber (D) Rubber for tires from rubber trees and steel frames and other metal parts from minerals such as iron (E) Art (F) Music (G) Making jewelry (H) Burning rubber.
Example Output:
A, B, C, D, G.