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: Although Bin Laden, Atef, and KSM initially contemplated using established al Qaeda members to execute the planes operation, the late 1999 arrival in Kandahar of four aspiring jihadists from Germany suddenly presented a more attractive alternative.
Sent 2: The Hamburg group shared the anti-U.S. fervor of the other candidates for the operation, but added the enormous advantages of fluency in English and familiarity with life in the West, based on years that each member of the group had spent living in Germany.
Sent 3: Not surprisingly, Mohamed Atta, Ramzi Binalshibh, Marwan al Shehhi, and Ziad Jarrah would all become key players in the 9/11 conspiracy.
Sent 4: Mohamed Atta was born on September 1, 1968, in Kafr el Sheikh, Egypt, to a middle-class family headed by his father, an attorney.
Sent 5: After graduating from Cairo University with a degree in architectural engineering in 1990, Atta worked as an urban planner in Cairo for a couple of years.
Sent 6: In the fall of 1991, he asked a German family he had met in Cairo to help him continue his education in Germany.
Sent 7: They suggested he come to Hamburg and invited him to live with them there, at least initially.
Sent 8: After completing a course in German, Atta traveled to Germany for the first time in July 1992.
Sent 9: He resided briefly in Stuttgart and then, in the fall of 1992, moved to Hamburg to live with his host family.
Sent 10: After enrolling at the University of Hamburg, he promptly transferred into the city engineering and planning course at the Technical University of Hamburg-Harburg, where he would remain registered as a student until the fall of 1999.
Sent 11: He appears to have applied himself fairly seriously to his studies (at least in comparison to his jihadist friends) and actually received his degree shortly before traveling to Afghanistan.
Sent 12: In school, Atta came across as very intelligent and reasonably pleasant, with an excellent command of the German language.
Sent 13: When Atta arrived in Germany, he appeared religious, but not fanatically so.
Sent 14: This would change, especially as his tendency to assert leadership became increasingly pronounced.
Sent 15: According to Binalshibh, as early as 1995 Atta sought to organize a Muslim student association in Hamburg.
Sent 16: In the fall of 1997, he joined a working group at the Quds mosque in Hamburg, a group designed to bridge the gap between Muslims and Christians.
Sent 17: Atta proved a poor bridge, however, because of his abrasive and increasingly dogmatic personality.
Sent 18: But among those who shared his beliefs, Atta stood out as a decisionmaker.
Question: Who was a student at Technical University of Hamburg-Harburg until 1999? (A) Mohamed Atta (B) Marwan al Shehhi (C) Atta (D) Ziad Jarrah (E) Ramzi Binalshibh.

Output: A, C.

Input: Consider Input: Paragraph- Sent 1: At 8:38, Ong told Gonzalez that the plane was flying erratically again.
Sent 2: Around this time Sweeney told Woodward that the hijackers were Middle Easterners, naming three of their seat numbers.
Sent 3: One spoke very little English and one spoke excellent English.
Sent 4: The hijackers had gained entry to the cockpit, and she did not know how.
Sent 5: The aircraft was in a rapid descent.
Sent 6: At 8:41, Sweeney told Woodward that passengers in coach were under the impression that there was a routine medical emergency in first class.
Sent 7: Other flight attendants were busy at duties such as getting medical supplies while Ong and Sweeney were reporting the events.
Sent 8: At 8:41, in American's operations center, a colleague told Marquis that the air traffic controllers declared Flight 11 a hijacking and "think he's [American 11] headed toward Kennedy [airport in New York City].
Sent 9: They're moving everybody out of the way.
Sent 10: They seem to have him on a primary radar.
Sent 11: They seem to think that he is descending."Sent 12: At 8:44, Gonzalez reported losing phone contact with Ong.
Sent 13: About this same time Sweeney reported to Woodward, "Something is wrong.
Sent 14: We are in a rapid descent .
Sent 15: we are all over the place."Sent 16: Woodward asked Sweeney to look out the window to see if she could determine where they were.
Question: How, according to Sweeney, hijackers gained entry to the cockpit? (A) He didnt't know (B) They gain entry through gun point (C) There was a routine medical emergency in first class (D) Sweeney did not know how (E) Walked in (F) Sweeney did not know how they had gained entry to the cockpit.

Output: C, D, F.

Input: Consider Input: Paragraph- Sent 1: One look at Fred Rooney, and you just know he's the good guy.
Sent 2: A trace of childish innocence in his face gives the lanky Bethlehem lawyer a Jimmy Stewart-like quality of quiet trust.
Sent 3: In black jeans and button-down shirt, he's a kind of folk hero in the south Bethlehem melting pot where he's crafted a law practice catering to working-class families - mostly Latino - in the shadow of the hulkish remnants of Bethlehem Steel.
Sent 4: A two-hour drive away, at City University of New York Law School in Queens, Rooney spends several days a week helping upstart lawyers develop storefront practices that, like his, provide legal representation to folks who can't afford a $250-an-hour legal counselor.
Sent 5: Kristin Booth Glen, the law school's dean, took one look at Rooney and knew he was the right person to head the innovative Community Legal Resources Network.
Sent 6: ''Fred's so low-key, he's Midwestern in effect,'' says Glen, a former New York Supreme Court judge.
Sent 7: ''He captivates people, he inspires loyalty.''Sent 8: For bringing legal representation to the poor and a host of other social causes, including finding medical care for seriously ill children in Latin America, the Moravian College Alumni Association has chosen Rooney for its prestigious Haupert Humanitarian Award.
Sent 9: The award, given to only a select few alumni, will be presented at 7:30 tonight at a reception on Moravian's Priscilla Payne Hurd campus.
Sent 10: Moravian, where he was an undergraduate in the early 1970s, inspired Rooney's deep sense of social justice.
Sent 11: The son of a Bethlehem Steel executive in New York, he came to the Bethlehem campus from an affluent upbringing on Long Island.
Sent 12: The young Rooney might have set his sights on Washington, D.C., like his uncle, former U.S. Rep. Fred Rooney of Bethlehem.
Sent 13: After all, politics run in the Rooney family.
Sent 14: His brother, state Rep. T.J. Rooney of Bethlehem, is a power in the state Legislature and the Democratic Party.
Sent 15: But on a trip to Colombia when he was a junior at Moravian, the child of privilege saw human suffering, malnutrition and poverty the likes of which he had never imagined.
Sent 16: ''I couldn't understand why we live this way and they live that way,'' Rooney recalled.
Sent 17: ''It's been the guiding light of my life ever since.''Sent 18: After graduating in CUNY Law School's first class in 1986, he took a job with Lehigh Valley Legal Services.
Question: What award will be presented on Moravian's Priscilla Payne Hurd campus? (A) The Haupert Humanitarian Award (B) Moravian College Alumni Association award (C) OSCAR.
Output: A.