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: You approach the door of your friends house.
Sent 2: What is the first thing you do before entering?
Sent 3: Of course, you wipe your feet.
Sent 4: You are a thoughtful visitor.
Sent 5: Fortunately, there is a nice piece of carpet by the door to wipe your shoes.
Sent 6: Too bad your caring comes at a price.
Sent 7: After wiping your feet on the mat you reach out to touch the brass knocker on the door.
Sent 8: A spark suddenly jumps between your hand and the metal.
Sent 9: You feel an electric shock.
Sent 10: Why do you think an electric shock occurs?
Sent 11: An electric shock occurs when there is a sudden discharge of static electricity.
Sent 12: Has this ever happened to you?
Sent 13: You reached out to touch a metal doorknob and received an unpleasant electric shock?
Sent 14: The reason you get a shock is because of moving electric charges.
Sent 15: Moving electric charges also create lightning bolts.
Sent 16: It is also the same reason electric current flows through cables and wires.
Question: When you approach a friends house, what is the first thing you do before entering? (A) You wipe your feet (B) Clean your shoes (C) Wipe my shoes (D) You knock on the door (E) Take off your shoes (F) Ring the bell (G) knock.

Ex Output:
A, B, C.

Ex Input:
Paragraph- Sent 1: The French have always wanted to know what it means to be aFrenchman.
Sent 2: Their history has been a constant quest for national identity: a conflict between strong regional loyalties and central authority.
Sent 3: In about 2000b.c.
Sent 4: Celtic tribes probably from eastern Europe came looking for greener pastures in the areas that are now Franche-Comte, Alsace, and Burgundy.
Sent 5: At the same time, migrants from the Mediterranean countries were trickling into the south.
Sent 6: The first recorded settlement was the trading post set up by Phocaean Greeks from Asia Minor at Massalia (Marseilles) around 600b.c.
Sent 7: , followed by other ports at Hyeres, Antibes, and Nice.
Sent 8: But the Greeks developed few contacts with the interior beyond a little commerce in olives and wine with the Celts of Burgundy.
Sent 9: When their position was threatened by Ligurian pirates at sea and warlike tribes from inland, the merchants of Marseilles called on Rome for help.
Sent 10: From Gaul to France In 125b.c.
Sent 11: , the Romans came in force, conquered the "Gallic barbarians," and set up a fortress at Aquae Sextiae (Aix-en-Provence).
Sent 12: They took advantage of this new stronghold to create Provincia (now Provence), stretching from the Alps to the Pyrenees, in order to guarantee communications between Italy and Spain.
Sent 13: When this province was endangered by fresh attacks from the north, Julius Caesar himself took charge, conquering practically the whole of Gaul by 50b.c.
Sent 14: Caesar drew Gaul's northeastern frontier at the Rhine, taking in present-day Belgium, and warned that the Germanic tribes across the river the Franks (after whom France is named), Alamans, and Saxons would always threaten the security of the frontier.
Sent 15: The Romanization of Gaul sent the most energetic warriors to defend the outposts of the empire while their families settled down to work the land or build towns such as Lyon, Orange, Arles, and Nimes, and the first great highways between them.
Sent 16: At the same time, merchants built up a thriving trade with the rest of the Roman Empire.
Sent 17: The pattern for the peasantry and bourgeoisie of France was thus established.
Sent 18: Christianity was introduced into Gaul in the first century a.d.
Question: When did the Romans set up a fortress at Aquae Sextiae (Aix-en-Provence)? (A) 50 B.C (B) 50b.c (C) 125 B.C (D) 1999 (E) 125b.c.

Ex Output:
C, E.

Ex Input:
Paragraph- Sent 1: Thelma James was a prime candidate for a real estate ripoff: She is 68, has precious little money and can't read or write.
Sent 2: "I won't lie to you.
Sent 3: I was so-o-o excited," the widow and former duplex dweller said of the purchase of her first home, a sagging frame structure on Snowden.
Sent 4: "I was glad to get me a house."Sent 5: When James realized she had been swindled she turned to Memphis Area Legal Services, which represented her in a lawsuit.
Sent 6: Now, James's monthly house notes have dropped from $796 - more than twice her monthly income - to an affordable $247.
Sent 7: Some of the people who took advantage of her through a questionable loan program were sent to jail.
Sent 8: "I don't know what I would have done without Legal Services," said James.
Sent 9: "They solved a lot of my problems."Sent 10: James is one of more than 3,000 clients served last year by MALS, which provides assistance for civil matters, such as domestic abuse and family-related problems, Social Security and Supplemental Security Income, veterans, housing and consumer fraud cases.
Sent 11: Like James, most clients are elderly or female.
Sent 12: Some are handicapped.
Sent 13: Some need medical care or veteran's benefits.
Sent 14: Some are trying to escape eviction or an abusive marriage.
Sent 15: And 87 percent live at or below poverty level.
Sent 16: Shelby County Mayor A C Wharton recently said Legal Services is important for those who, because of poverty or other struggles in life, think justice is an empty word.
Sent 17: "They must be given reason to believe that the law is for them too," said Wharton, a former executive director of MALS.
Sent 18: But MALS faces a funding crunch next year, brought on by a $200,000 shortfall from three revenue sources.
Question: By how much was the Memphis Area Legal Services able to drop James' monthly house notes? (A) $247 (B) From $247 to $796 (C) Twice her monthly income (D) $796 (E) $549.

Ex Output:
B, E.