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: The dermis is the inner layer of skin.
Sent 2: The dermis has blood vessels and nerve endings.
Sent 3: The nerve endings explain why your skin is sensitive.
Sent 4: You can sense pain, pressure, and temperature.
Sent 5: You cut your finger and it starts to bleed.
Sent 6: What has happened?
Sent 7: If your skin bleeds, it means you have cut the dermis layer and damaged blood vessels.
Sent 8: The cut really hurts.
Sent 9: It hurts because of the nerve endings in this skin layer.
Sent 10: The dermis also contains hair follicles and two types of glands.
Sent 11: Hair follicles are structures where hairs originate.
Sent 12: Each hair grows out of a follicle.
Sent 13: Hair passes up through the epidermis.
Sent 14: It then extends above the skin surface.
Sent 15: Oil glands produce an oily substance.
Sent 16: The oil is secreted into hair follicles.
Question: If you were to cut your finger, why does it hurt? (A) Because you seriously hurt yourself (B) Because of the never endings (C) Because The dermis have nerve endings (D) Oil glandes (E) It hurts due to the nerve endings in the dermis layer.

Ex Output:
B, C, E.

Ex Input:
Paragraph- Sent 1: Adrienne Saunders is happily married to her art dealer husband , Jack .
Sent 2: They have a daughter named Mary .
Sent 3: Adrienne hears from a friend that she thought she saw Jack in town when he claimed to be on an out of town business trip .
Sent 4: Adrienne confronts him , but he denies being in town , and their lives continue .
Sent 5: Soon after a museum curator is mysteriously murdered , and a relic that Jack bought for the museum is revealed to be a fake .
Sent 6: Jack is placed under suspicion , and then Adrienne receives word from the police that Jack perished in a car accident .
Sent 7: In trying to wrap up Jack 's affairs , Adrienne begins to suspect that her husband had switched identities with a high school classmate , Frank Sullivan .
Sent 8: When she sees a high school yearbook picture of her husband attributed to Sullivan , she is convinced .
Sent 9: She tracks down a relative of Saunders , who confirms that Frank and Jack were inseparable in high school .
Sent 10: After Jack died , the relative never saw Frank again .
Sent 11: She explained that Frank 's father was an alcoholic and that his mother worked as a toll booth operator .
Sent 12: She directs Adrienne to Frank 's mother , who lives in a rundown apartment in Brooklyn .
Sent 13: Frank 's mother bitterly receives the news that she has a granddaughter , telling Adrienne that Frank was always selfish and that he never looked in on her .
Sent 14: A stalker lurks at Adrienne 's loft .
Sent 15: He comes in to Adrienne 's bed while she is asleep and caresses her .
Sent 16: He watches Mary , who is spooked by the man in her room at night .
Question: Who is Mary's real father? (A) Sullivan (B) Frank Sullivan (C) Jack (D) Frank.

Ex Output:
A, B, D.

Ex Input:
Paragraph- Sent 1: Bin Laden reportedly discussed the planes operation with KSM and Atef in a series of meetings in the spring of 1999 at the al Matar complex near Kandahar.
Sent 2: KSM's original concept of using one of the hijacked planes to make a media statement was scrapped, but Bin Laden considered the basic idea feasible.
Sent 3: Bin Laden, Atef, and KSM developed an initial list of targets.
Sent 4: These included the White House, the U.S. Capitol, the Pentagon, and the World Trade Center.
Sent 5: According to KSM, Bin Laden wanted to destroy the White House and the Pentagon, KSM wanted to strike the World Trade Center, and all of them wanted to hit the Capitol.
Sent 6: No one else was involved in the initial selection of targets.
Sent 7: Bin Laden also soon selected four individuals to serve as suicide operatives: Khalid al Mihdhar, Nawaf al Hazmi, Khallad, and Abu Bara al Yemeni.
Sent 8: During the al Matar meetings, Bin Laden told KSM that Mihdhar and Hazmi were so eager to participate in an operation against the United States that they had already obtained U.S. visas.
Sent 9: KSM states that they had done so on their own after the suicide of their friend Azzam (Nashiri's cousin) in carrying out the Nairobi bombing.
Sent 10: KSM had not met them.
Sent 11: His only guidance from Bin Laden was that the two should eventually go to the United States for pilot training.
Sent 12: Hazmi and Mihdhar were Saudi nationals, born in Mecca.
Sent 13: Like the others in this initial group of selectees, they were already experienced mujahideen.
Sent 14: They had traveled together to fight in Bosnia in a group that journeyed to the Balkans in 1995.
Sent 15: By the time Hazmi and Mihdhar were assigned to the planes operation in early 1999, they had visited Afghanistan on several occasions.
Sent 16: Khallad was another veteran mujahid, like much of his family.
Sent 17: His father had been expelled from Yemen because of his extremist views.
Sent 18: Khallad had grown up in Saudi Arabia, where his father knew Bin Laden, Abdullah Azzam, and Omar Abdel Rahman (the "Blind Sheikh").
Question: Besides Bin Laden, KSM, and Atef, who else was involved in discussing the initial selection of targets? (A) No one else (B) Azzam (C) Yemeni (D) Nashiri (E) Mihdhar (F) Hazmi.

Ex Output:
A.