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: American Airlines Flight 11: FAA Awareness.
Sent 2: Although the Boston Center air traffic controller realized at an early stage that there was something wrong with American 11, he did not immediately interpret the plane's failure to respond as a sign that it had been hijacked.
Sent 3: At 8:14, when the flight failed to heed his instruction to climb to 35,000 feet, the controller repeatedly tried to raise the flight.
Sent 4: He reached out to the pilot on the emergency frequency.
Sent 5: Though there was no response, he kept trying to contact the aircraft.
Sent 6: At 8:21, American 11 turned off its transponder, immediately degrading the information available about the aircraft.
Sent 7: The controller told his supervisor that he thought something was seriously wrong with the plane, although neither suspected a hijacking.
Sent 8: The supervisor instructed the controller to follow standard procedures for handling a "no radio" aircraft.
Sent 9: The controller checked to see if American Airlines could establish communication with American 11.
Sent 10: He became even more concerned as its route changed, moving into another sector's airspace.
Sent 11: Controllers immediately began to move aircraft out of its path, and asked other aircraft in the vicinity to look for American 11.
Sent 12: At 8:24:38, the following transmission came from American 11: American 11: We have some planes.
Sent 13: Just stay quiet, and you'll be okay.
Sent 14: We are returning to the airport.
Sent 15: The controller only heard something unintelligible; he did not hear the specific words "we have some planes."Sent 16: The next transmission came seconds later: American 11: Nobody move.
Sent 17: Everything will be okay.
Sent 18: If you try to make any moves, you'll endanger yourself and the airplane.
Question: What did the controllers do when American 11 left the first controller's airspace and moved into another sector? (A) The suspected a hijacking (B) Immediately began to move aircraft out of its path and asked other aircraft (C) They asked other aircraft to look for American 11 (D) They began to move aircrafts out of its path (E) They reached out on the emergency frequency (F) Told the supervisor that something was wrong with the plane (G) They moved other flights out of its path and asked other area planes to look for American 11.

Output: B, C, D, G.

Input: Consider Input: Paragraph- Sent 1: You may wonder if there are other examples of static discharge.
Sent 2: The answer is yes.
Sent 3: Lightning is a form of static discharge.
Sent 4: It is much more dramatic than what happens between you and the door knocker, but it is the same principle.
Sent 5: You can see how it occurs in the following diagram and animation.
Sent 6: You have no doubt seen lightning in a rainstorm.
Sent 7: What does lighting have to do with static electricity?
Sent 8: As it turns out, everything!
Sent 9: During a rainstorm, clouds develop regions of different charges.
Sent 10: This happens due to the movement of air molecules, water drops, and ice particles.
Sent 11: The negative charges are concentrated at the base of the clouds.
Sent 12: The positive charges are concentrated at the top.
Sent 13: The negative charges repel electrons on the ground below.
Sent 14: The ground then becomes positively charged.
Sent 15: Over time the differences increase.
Sent 16: Eventually the electrons are discharged.
Sent 17: This is what we see as lightning.
Sent 18: You can watch an awesome slow-motion lightning strike below.
Question: Is lightning a form of static discharge? (A) No (B) Yes (C) Agree (D) Disagree.

Output: B, C.

Input: Consider Input: Paragraph- Sent 1: (CNN) -- English club Chelsea have completed the signing of Oriol Romeu from Spanish and European champions Barcelona.
Sent 2: The 19-year-old is currently playing for Spain at the World Under-20 Championships in Colombia and has signed a four-year deal with last season's Premier League runners-up.
Sent 3: The deal is worth $7 million and includes a buy back clause, set at $14 million after the first year and $21 million after the second.
Sent 4: Romeu started his career at Barcelona's city rivals Espanyol before joining the Camp Nou academy in 2004.
Sent 5: The midfielder, who can also play in central defence, made his debut for Barcelona in last season's Spanish Supercup match with Seville and got his first taste of league action against Deportivo in May 2010.
Sent 6: He has played 90 minutes in both of Spain's games at the World Under-20 Championships, when they beat Costa Rica and Ecuador.
Sent 7: Chelsea official web site confirmed the signing and said Romeu is "renowned for his strength and his expansive passing ability."Sent 8: Another player leaving Barcelona is Jeffren Suarez after he agreed to join Sporting Lisbon.
Sent 9: The Portuguese outfit have paid $5 million for the 23-year-old which, like the Romeu deal, includes a buy back option.
Sent 10: Jeffren joined Barca from Tenerife in 2004 and made his debut for the Catalan club in the 2006-07 season.
Question: Which 23-year-old player is leaving the Spanish team? (A) Jeffren Romeu (B) Jeffren Suarez (C) Oriol Romeu (D) Chelsea (E) Nou.
Output: C.