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 Q]: Paragraph- Sent 1: Breathing is the process of moving air into and out of the lungs.
Sent 2: The process depends on a muscle called the diaphragm.
Sent 3: This is a large, sheet-like muscle below the lungs.
Sent 4: Inhaling, or breathing in, occurs when the diaphragm muscle tightens.
Sent 5: This increases the size of the chest.
Sent 6: This too decreases air pressure inside the lungs.
Sent 7: This action allows air and gases to enter the lungs.
Sent 8: Exhaling, or breathing out, occurs when the diaphragm muscle relaxes.
Sent 9: This decreases the size of the chest.
Sent 10: This increases air pressure inside the lungs.
Sent 11: This action allows for air to leave the lungs.
Sent 12: When you inhale, air enters the respiratory system through your nose and ends up in your lungs, where gas exchange with the blood takes place.
Sent 13: What happens to the air along the way?
Sent 14: In the nose, mucus and hairs trap any dust or other particles in the air.
Sent 15: The air is also warmed and moistened.
Sent 16: Next, air passes through a passageway that is connected to the windpipe.
Sent 17: The air then finds its way to the lungs.
Sent 18: In the chest, the windpipe splits so that air enters both the right and left lung.
Question: What is the muscle called that tightens and relaxes, allowing you to breathe? (A) Chest (B) Diaphragm (C) Biceps.
[EX A]: B.

[EX Q]: Paragraph- Sent 1: Duane was hungry, but he hurried through the ample supper that was set before him, urged on by curiosity and astonishment.
Sent 2: The only way he could account for his presence there in a ranger's camp was that MacNelly hoped to get useful information out of him.
Sent 3: Still that would hardly have made this captain so eager.
Sent 4: There was a mystery here, and Duane could scarcely wait for it to be solved.
Sent 5: While eating he had bent keen eyes around him.
Sent 6: After a first quiet scrutiny the rangers apparently paid no more attention to him.
Sent 7: They were all veterans in service--Duane saw that--and rugged, powerful men of iron constitution.
Sent 8: Despite the occasional joke and sally of the more youthful members, and a general conversation of camp-fire nature, Duane was not deceived about the fact that his advent had been an unusual and striking one, which had caused an undercurrent of conjecture and even consternation among them.
Sent 9: These rangers were too well trained to appear openly curious about their captain's guest.
Sent 10: If they had not deliberately attempted to be oblivious of his presence Duane would have concluded they thought him an ordinary visitor, somehow of use to MacNelly.
Sent 11: As it was, Duane felt a suspense that must have been due to a hint of his identity.
Question: Who invited Duane to stay at the camp? (A) The Rangers (B) MacNelly (C) Veterans.
[EX A]: B.

[EX Q]: Paragraph- Sent 1: We do not know exactly how the hijackers gained access to the cockpit; FAA rules required that the doors remain closed and locked during flight.
Sent 2: Ong speculated that they had "jammed their way" in.
Sent 3: Perhaps the terrorists stabbed the flight attendants to get a cockpit key, to force one of them to open the cockpit door, or to lure the captain or first officer out of the cockpit.
Sent 4: Or the flight attendants may just have been in their way.
Sent 5: At the same time or shortly thereafter, Atta-the only terrorist on board trained to fly a jet-would have moved to the cockpit from his business-class seat, possibly accompanied by Omari.
Sent 6: As this was happening, passenger Daniel Lewin, who was seated in the row just behind Atta and Omari, was stabbed by one of the hijackers-probably Satam al Suqami, who was seated directly behind Lewin.
Sent 7: Lewin had served four years as an officer in the Israeli military.
Sent 8: He may have made an attempt to stop the hijackers in front of him, not realizing that another was sitting behind him.
Sent 9: The hijackers quickly gained control and sprayed Mace, pepper spray, or some other irritant in the first-class cabin, in order to force the passengers and flight attendants toward the rear of the plane.
Sent 10: They claimed they had a bomb.
Sent 11: About five minutes after the hijacking began, Betty Ong contacted the American Airlines Southeastern Reservations Office in Cary, North Carolina, via an AT&T airphone to report an emergency aboard the flight.
Sent 12: This was the first of several occasions on 9/11 when flight attendants took action outside the scope of their training, which emphasized that in a hijacking, they were to communicate with the cockpit crew.
Sent 13: The emergency call lasted approximately 25 minutes, as Ong calmly and professionally relayed information about events taking place aboard the airplane to authorities on the ground.
Sent 14: At 8:19, Ong reported:"The cockpit is not answering, somebody's stabbed in business class-and I think there's Mace-that we can't breathe-I don't know, I think we're getting hijacked."Sent 15: She then told of the stabbings of the two flight attendants.
Sent 16: At 8:21, one of the American employees receiving Ong's call in North Carolina, Nydia Gonzalez, alerted the American Airlines operations center in Fort Worth, Texas, reaching Craig Marquis, the manager on duty.
Sent 17: Marquis soon realized this was an emergency and instructed the airline's dispatcher responsible for the flight to contact the cockpit.
Sent 18: At 8:23, the dispatcher tried unsuccessfully to contact the aircraft.
Question: For what country was the stabbed man a part of the military? (A) Iraq (B) United States (C) US (D) India (E) Israel (F) Pakistan.
[EX A]:
E.