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: (OPRAH.com) -- Chris Rock is an Emmy-winning comedian, devoted husband and loving father --but it's time to get to know a new side of this funnyman.
Sent 2: Meet Chris Rock, hair expert.
Sent 3: It's a detour he took after an innocent carpool ride left Rock with an idea he just couldn't shake.
Sent 4: "I was with my daughter one day, and we're in the car and she's with one of her friends in the back seat, a little white friend," he says.
Sent 5: "She was just kind of raving about her friend's hair a little too much for my comfort [saying]: 'You've got great hair.
Sent 6: Oh, your hair's so good.'" Not wanting to make her comments a big deal, Rock says he tried to play his them off.
Sent 7: "[I said]: "Oh, baby, your hair's beautiful.
Sent 8: Come on,'" he says.
Sent 9: "If I would have really reacted, then she would have a complex about her hair."Sent 10: Still, Rock couldn't let it go.
Sent 11: "It sparked something in me," he says.
Sent 12: Oprah.com: Oprah's hair throughout the years!
Sent 13: What Rock discovered is a $9 billion industry that affects the daily activities, wallets, self-esteem -- and even the sex lives -- of black women.
Sent 14: Because women spend so much time and money on their hair, Rock says men are forced to adopt a hands-off policy.
Sent 15: "You cannot touch a black woman's hair.
Sent 16: You are conditioned not to even go there," he says.
Sent 17: "When I was a dating guy, I dated women from different races.
Sent 18: Anytime I was with an Asian or a Puerto Rican girl or a white girl, my hands would constantly be in their hair.
Question: Who is Chris Rock? (A) Taxi driver (B) Chris Rock is an Emmy-winning comedian, husband, father, and a hair expert (C) Comedian (D) Expert (E) Emmy-winning comedian (F) Shakespearean actor (G) Hair Expert (H) Emmy award winning comedian (I) Devoted husband and loving father (J) Hair dresser.

Ex Output:
B, C, E, G, H, I.

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: Which engine, other than Tillie, is both able and unable to pull the birthday train? (A) Tower (B) Chip (C) Farnsworth (D) Pete (E) Jebediah.

Ex Output:
E.

Ex Input:
Paragraph- Sent 1: Many plants and animal species have lived on Earth.
Sent 2: Most are no longer alive.
Sent 3: Only a tiny number of species still live on Earth.
Sent 4: If not for fossils, we would know little about species that did not survive.
Sent 5: Fossils provide evidence.
Sent 6: They give us clues to past life on Earth.
Sent 7: They tell us that life on Earth has changed over time.
Sent 8: Fossils in younger rock Fossils can also tell us about how plants and animals lived in the past.
Sent 9: Was it land or marine?
Sent 10: Was the water shallow or deep?
Sent 11: Fossils can even provide clues to ancient climates.
Sent 12: They can tell us if it was warm or cold.
Sent 13: Maybe it was cold or hot?
Sent 14: Some places that are now cold were once warm.
Sent 15: Some places that are now hot and dry were once wet and cool.
Sent 16: Fossils provide a window into the past.
Question: Do fossils provide evidence of changes in climates over time? (A) No (B) Yes, the Fossils can even provide clues to ancient climates (C) They can tell us about species that did not survive (D) Yes.

Ex Output:
B, D.