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: Were the key players in the 9/11 conspiracy who executed the plane operations established al Qaeda members? (A) Yes (B) Not specified.

Output: A.

Input: Consider Input: Paragraph- Sent 1: Oh no!
Sent 2: Your younger sister just mixed up all of your LEGO parts.
Sent 3: Now you have to put them all back into the original categories.
Sent 4: How will you do this?
Sent 5: You sort them by size and shape until they are each back into their specific place in the tray.
Sent 6: What do you think you could have called the mess your younger sister created?
Sent 7: Thats right, it is a mixture.
Sent 8: Fortunately, it was a physical change and she just made a simple mixture.
Sent 9: You are able to separate them back into order.
Sent 10: Its a good thing she did not toss them into the fireplace.
Sent 11: That would have caused a chemical change as they all melted together.
Sent 12: If your LEGOs were melted, you would be out of luck for building that next big project.
Question: What your sister created, what is it called? (A) A mixture (B) A simple mixture (C) A fireplace (D) A chemical change.

Output: A, B.

Input: Consider Input: Paragraph- Sent 1: After the 1998 embassy bombings, the U.S. government tried to develop a clearer picture of Bin Laden's finances.
Sent 2: A U.S. interagency group traveled to Saudi Arabia twice, in 1999 and 2000, to get information from the Saudis about their understanding of those finances.
Sent 3: The group eventually concluded that the oft-repeated assertion that Bin Laden was funding al Qaeda from his personal fortune was in fact not true.
Sent 4: The officials developed a new theory: al Qaeda was getting its money elsewhere, and the United States needed to focus on other sources of funding, such as charities, wealthy donors, and financial facilitators.
Sent 5: Ultimately, although the intelligence community devoted more resources to the issue and produced somewhat more intelligence, it remained difficult to distinguish al Qaeda's financial transactions among the vast sums moving in the international financial system.
Sent 6: The CIA was not able to find or disrupt al Qaeda's money flows.
Sent 7: The NSC staff thought that one possible solution to these weaknesses in the intelligence community was to create an all-source terrorist-financing intelligence analysis center.
Sent 8: Clarke pushed for the funding of such a center at Treasury, but neither Treasury nor the CIA was willing to commit the resources.
Sent 9: Within the United States, various FBI field offices gathered intelligence on organizations suspected of raising funds for al Qaeda or other terrorist groups.
Sent 10: By 9/11, FBI agents understood that there were extremist organizations operating within the United States supporting a global jihadist movement and with substantial connections to al Qaeda.
Sent 11: The FBI operated a web of informants, conducted electronic surveillance, and had opened significant investigations in a number of field offices, including New York, Chicago, Detroit, San Diego, and Minneapolis.
Sent 12: On a national level, however, the FBI never used the information to gain a systematic or strategic understanding of the nature and extent of al Qaeda fundraising.
Sent 13: Treasury regulators, as well as U.S. financial institutions, were generally focused on finding and deterring or disrupting the vast flows of U.S. currency generated by drug trafficking and high-level international fraud.
Sent 14: Large-scale scandals, such as the use of the Bank of New York by Russian money launderers to move millions of dollars out of Russia, captured the attention of the Department of the Treasury and of Congress.
Sent 15: Before 9/11, Treasury did not consider terrorist financing important enough to mention in its national strategy for money laundering.
Question: Which U.S. agency failed to connect the dots collected by a number of field offices concerning al Queda fundraising? (A) Congress (B) Treasury (C) The NSA (D) FBI (E) The CIA.
Output: D.