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: A flight from Los Angeles to Nashville is diverted to land in Las Vegas , Nevada when one of the passengers , Ralph Bundt becomes violent and attacks a stewardess .
Sent 2: Ralph had been bitten by a hamster Which is really a lab rat , brought onto the plane by Henry for his school students .
Sent 3: Ralph is restrained , but not before he bites the flight attendant Paula .
Sent 4: The plane is forced to make an emergency landing in Las Vegas , and once it has landed , air traffic control refuses to let it approach the gate .
Sent 5: Disobeying orders , Captain Forrest and his co-pilot Willsy find a jetway operated by a baggage handler Ed Ramirez .
Sent 6: Almost everyone evacuates the plane , except for the elderly couple Bev Stevens and her paralyzed mute husband Doc Stevens , and the pilots , who try to keep the violent Ralph contained in an aircraft bathroom .
Sent 7: However , they learn that they have been locked out of the airport .
Sent 8: Soon , armed soldiers and what appear to be CDC scientists surround the terminal .
Sent 9: One of the passengers , a military medic named Shilah Washington , reveals she has a medical kit in her bag in the plane's cargo hold .
Sent 10: The lead flight attendant Jenny , Henry , Ed , Nial Britz , and Preston sneak back into the plane to retrieve it .
Sent 11: They retrieve Shilah's kit and Nial's gun and they try to leave the hold .
Sent 12: While in the plane , Jenny is attacked by an infected Captain Forrest and Nial shoots and kills him , but it seems that some of the captain's blood had gotten into Nial's eye .
Question: Where is Ralph contained after he is bitten by a hamster? (A) Terminal (B) Bedroom (C) Aircraft bathroom (D) Aircraft seat.

Ex Output:
C.

Ex Input:
Paragraph- Sent 1: Eric , a young boy , is excited about his birthday after reading a book and believes that a train will come for him , despite his sister Jill's disbelief .
Sent 2: A few hours later , the train station's control tower wakes up and in the roundhouse , Tillie , a young little blue switcher engine , along with her best bird friend , Chip , wakes up four other trains : Georgia , a kind all-purpose engine , Farnsworth , a stuck-up passenger engine , Jebediah , a worn-out old engine , and Pete , a gruff , burly freight engine .
Sent 3: After the tower assigns Farnsworth and Pete their jobs , Tillie tries to help with the milk train assigned to Jebediah , but the tower insists that she is too small for the job .
Sent 4: Georgia is assigned to pull the birthday train .
Sent 5: A clown named Rollo leads the toys into the train , including Stretch , a basketball player ; Missy , a ballerina ; a Handy Pandy , a panda ; Perky , an elephant ; and Grumpella , a stuffed bird .
Sent 6: During her journey , Georgia breaks down and is taken back to the roundhouse by Doc .
Sent 7: Left behind , Rollo eventually takes Doc's advice of flagging down one of the other engines returning from their daily runs over the mountain .
Sent 8: Farnsworth and Pete turn down their offers to pull the train .
Sent 9: Meanwhile , Tillie asks the tower to rescue the stranded train , but he insists that Tillie will never do the job .
Sent 10: Jebediah turns down his offer to pull the train because of his age , and returns to the roundhouse .
Sent 11: Chip and Tillie sneak past the sleeping tower and pulls the birthday train up a mountain .
Question: What kind of train engine is assigned to pull the birthday train? (A) A stuck-up passenger engine (B) Georgia (C) Farnsworth (D) A kind all-purpose engine (E) Pete (F) A worn-out old engine.

Ex Output:
B, D.

Ex Input:
Paragraph- Sent 1: How would the universe look without gravity?
Sent 2: It would have no planets and no stars.
Sent 3: Thats how it looked when it was young.
Sent 4: When the universe was young, there was only gas and dust.
Sent 5: From this gas and dust, everything we now see was made.
Sent 6: How were stars and planets created from just gas and dust?
Sent 7: The answer is gravity.
Sent 8: The same gravity that holds you down on Earth.
Sent 9: The same force that causes your pencil to roll off your desk.
Sent 10: The same force that causes it to fall to the floor.
Sent 11: The invisible force of gravity caused dust and gas particles to be pulled together.
Sent 12: This force is what formed all the objects in our solar system.
Sent 13: This force formed the smallest moons.
Sent 14: It also formed our Sun.
Sent 15: This force caused more than just our solar system to form.
Sent 16: It caused all the other solar systems to form.
Sent 17: It caused the formation of all the galaxies of the universe.
Question: Did the universe always have a sun? (A) No (B) Yes (C) It came before the universe (D) No, the universe did not have planets or stars, only gas and dust, from which the Sun was created.

Ex Output:
A, D.