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.

Ex Input:
Paragraph- Sent 1: At 9:48, a representative from the White House shelter asked if there were any indications of another hijacked aircraft.
Sent 2: The deputy director for operations mentioned the Delta flight and concluded that "that would be the fourth possible hijack."Sent 3: At 9:49, the commander of NORAD directed all air sovereignty aircraft to battle stations, fully armed.
Sent 4: At 9:59, an Air Force lieutenant colonel working in the White House Military Office joined the conference and stated he had just talked to Deputy National Security Advisor Stephen Hadley.
Sent 5: The White House requested (1) the implementation of continuity of government measures, (2) fighter escorts for Air Force One, and (3) a fighter combat air patrol over Washington, D.C.
Sent 6: By 10:03, when United 93 crashed in Pennsylvania, there had been no mention of its hijacking and the FAA had not yet been added to the teleconference.
Sent 7: The President and the Vice President The President was seated in a classroom when, at 9:05, Andrew Card whispered to him: "A second plane hit the second tower.
Sent 8: America is under attack."Sent 9: The President told us his instinct was to project calm, not to have the country see an excited reaction at a moment of crisis.
Sent 10: The press was standing behind the children; he saw their phones and pagers start to ring.
Sent 11: The President felt he should project strength and calm until he could better understand what was happening.
Sent 12: The President remained in the classroom for another five to seven minutes, while the children continued reading.
Sent 13: He then returned to a holding room shortly before 9:15, where he was briefed by staff and saw television coverage.
Sent 14: He next spoke to Vice President Cheney, Dr. Rice, New York Governor George Pataki, and FBI Director Robert Mueller.
Sent 15: He decided to make a brief statement from the school before leaving for the airport.
Sent 16: The Secret Service told us they were anxious to move the President to a safer location, but did not think it imperative for him to run out the door.
Sent 17: Between 9:15 and 9:30, the staff was busy arranging a return to Washington, while the President consulted his senior advisers about his remarks.
Sent 18: No one in the traveling party had any information during this time that other aircraft were hijacked or missing.
Sent 19: Staff was in contact with the White House Situation Room, but as far as we could determine, no one with the President was in contact with the Pentagon.
Question: Who told the president that "America is under attack" (A) Dick Cheney (B) Robert Mueller (C) Andrew Card (D) Hillary Clinton (E) VP Dick Cheney (F) NORAD.

Ex Output:
C.

Ex Input:
Paragraph- Sent 1: In short, the United States has to help defeat an ideology, not just a group of people, and we must do so under difficult circumstances.
Sent 2: How can the United States and its friends help moderate Muslims combat the extremist ideas?
Sent 3: Recommendation: The U.S. government must define what the message is, what it stands for.
Sent 4: We should offer an example of moral leadership in the world, committed to treat people humanely, abide by the rule of law, and be generous and caring to our neighbors.
Sent 5: America and Muslim friends can agree on respect for human dignity and opportunity.
Sent 6: To Muslim parents, terrorists like Bin Laden have nothing to offer their children but visions of violence and death.
Sent 7: America and its friends have a crucial advantage-we can offer these parents a vision that might give their children a better future.
Sent 8: If we heed the views of thoughtful leaders in the Arab and Muslim world, a moderate consensus can be found.
Sent 9: That vision of the future should stress life over death: individual educational and economic opportunity.
Sent 10: This vision includes widespread political participation and contempt for indiscriminate violence.
Sent 11: It includes respect for the rule of law, openness in discussing differences, and tolerance for opposing points of view.
Sent 12: Recommendation: Where Muslim governments, even those who are friends, do not respect these principles, the United States must stand for a better future.
Sent 13: One of the lessons of the long Cold War was that short-term gains in cooperating with the most repressive and brutal governments were too often outweighed by long-term setbacks for America's stature and interests.
Sent 14: American foreign policy is part of the message.
Sent 15: America's policy choices have consequences.
Sent 16: Right or wrong, it is simply a fact that American policy regarding the Israeli-Palestinian conflict and American actions in Iraq are dominant staples of popular commentary across the Arab and Muslim world.
Sent 17: That does not mean U.S. choices have been wrong.
Sent 18: It means those choices must be integrated with America's message of opportunity to the Arab and Muslim world.
Question: Which parents can be offered a vision that might give their children a better future? (A) Muslim parents (B) Moderate Muslims (C) Muslim extremists (D) Arab parents (E) Bin Laden's children (F) American parents.

Ex Output:
A, B, F.

Ex Input:
Paragraph- Sent 1: The only home Hamilton ever owned was a Federal style mansion designed by John McComb Jr., which he built on his 32-acre country estate in Hamilton Heights in upper Manhattan.
Sent 2: He named the house, which was completed in 1802, the "Grange" after his grandfather Alexander's estate in Ayrshire, Scotland.
Sent 3: The house remained in the family until 1833 when his widow sold it to Thomas E. Davis, a British born real estate developer, for $25,000.
Sent 4: Part of the proceeds were used by Eliza to purchase a new townhouse from Davis (Hamilton-Holly House) in Greenwich Village with her son Alexander.
Sent 5: The Grange, first moved from its original location in 1889, was moved again in 2008 to a spot in St. Nicholas Park on land that was once part of the Hamilton estate, in Hamilton Heights, a neighborhood in upper Manhattan.
Sent 6: The historic structure was restored to its original 1802 appearance in 2011, and is maintained by the National Park service as Hamilton Grange National Memorial.
Sent 7: Alexander Hamilton served as one of the first trustees of the Hamilton-Oneida Academy in New York state.
Sent 8: Later the Academy received a college charter in 1812, and the school was formally renamed Hamilton College.Columbia University, Hamilton's alma mater, has official memorials to Hamilton on its campus in New York City.
Sent 9: The college's main classroom building for the humanities is Hamilton Hall, and a large statue of Hamilton stands in front of it.
Sent 10: The university press has published his complete works in a multivolume letterpress edition.
Sent 11: Columbia University's student group for ROTC cadets and Marine officer candidates is named the Alexander Hamilton Society.
Question: How many years did the Grange house remain in the family? (A) 87 years (B) 31 years.

Ex Output:
B.