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.

Input: Consider 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: Who did Pushkin kill to when fending off his wive's would be seducer? (A) Tsarskoye Selo Lyceum (B) Georges-Charles de Heeckeren d'Anthes (C) Vowing.

Output: B.

Input: Consider Input: Paragraph- Sent 1: "What goes up must come down."Sent 2: You have probably heard that statement before.
Sent 3: At one time this statement was true, but no longer.
Sent 4: Since the 1960s, we have sent many spacecraft into space.
Sent 5: Some are still traveling away from Earth.
Sent 6: So it is possible to overcome gravity.
Sent 7: Do you need a giant rocket to overcome gravity?
Sent 8: No, you actually overcome gravity every day.
Sent 9: Think about when you climb a set of stairs.
Sent 10: When you do, you are overcoming gravity.
Sent 11: What if you jump on a trampoline?
Sent 12: You are overcoming gravity for a few seconds.
Sent 13: Everyone can overcome gravity.
Sent 14: You just need to apply a force larger than gravity.
Sent 15: Think about that the next time you jump into the air.
Sent 16: You are overcoming gravity for a brief second.
Sent 17: Enjoy it while it lasts.
Sent 18: Eventually, gravity will win the battle.
Question: Can a person overcome gravity? (A) Never (B) It is possible (C) Yes, by jumping up into the air or climbing stairs.

Output: B, C.

Input: Consider Input: Paragraph- Sent 1: Charlie Y. Reader is a 35-year-old theatrical agent in New York , living a seemingly idyllic life as a bachelor .
Sent 2: Numerous women ( among them Poppy , Helen , and Jessica come and go , cleaning and cooking for him .
Sent 3: Charlie 's best friend since kindergarten , Joe McCall , who has a wife named Ethel and children in Indianapolis , comes to New York for a stay at Charlie 's apartment , claiming that the excitement is gone from his 11-year marriage and that he wants to leave his wife .
Sent 4: Joe envies and is amazed by Charlie 's parade of girlfriends , while Charlie professes admiration for Joe 's married life and family .
Sent 5: At an audition , Charlie meets singer-actress Julie Gillis .
Sent 6: She has her life planned to a tight schedule , determined to marry and retire from performing to a life of child-rearing by 22 .
Sent 7: Although at first she wards off Charlie 's advances , she comes to see him as the ideal man for her plans .
Sent 8: Julie demands that Charlie stop seeing other women .
Sent 9: Charlie balks , but he begins to fall in love with her .
Sent 10: Joe starts keeping company with Sylvia Crewes , a sophisticated classical musician and a typically neglected lover of Charlie 's .
Sent 11: Sylvia is approaching 33 and desires marriage as much as the younger Julie does .
Sent 12: One day , annoyed by Julie and possibly jealous of Joe 's attentions , Charlie blurts out a proposal of marriage to Sylvia .
Sent 13: She is thrilled , only to discover the morning after their engagement party that he has proposed to Julie as well .
Sent 14: Joe confesses his love to Sylvia and asks her to marry him .
Question: Who proposes marriage to Sylvia? (A) Julie (B) Joe (C) Both Joe and Charlie propose marriage to Sylvia (D) Charlie.
Output: B, C, D.