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: The CIA's senior management saw problems with the armed Predator as well, problems that Clarke and even Black and Allen were inclined to minimize.
Sent 2: One (which also applied to reconnaissance flights) was money.
Sent 3: A Predator cost about $3 million.
Sent 4: If the CIA flew Predators for its own reconnaissance or covert action purposes, it might be able to borrow them from the Air Force, but it was not clear that the Air Force would bear the cost if a vehicle went down.
Sent 5: Deputy Secretary of Defense Wolfowitz took the position that the CIA should have to pay for it; the CIA disagreed.
Sent 6: Second, Tenet in particular questioned whether he, as Director of Central Intelligence, should operate an armed Predator."Sent 7: This was new ground,"he told us.
Sent 8: Tenet ticked off key questions: What is the chain of command?
Sent 9: Who takes the shot?
Sent 10: Are America's leaders comfortable with the CIA doing this, going outside of normal military command and control?
Sent 11: Charlie Allen told us that when these questions were discussed at the CIA, he and the Agency's executive director, A. B." Buzzy" Krongard, had said that either one of them would be happy to pull the trigger, but Tenet was appalled, telling them that they had no authority to do it, nor did he.
Sent 12: Third, the Hellfire warhead carried by the Predator needed work.
Sent 13: It had been built to hit tanks, not people.
Sent 14: It needed to be designed to explode in a different way, and even then had to be targeted with extreme precision.
Sent 15: In the configuration planned by the Air Force through mid-2001, the Predator's missile would not be able to hit a moving vehicle.
Sent 16: White House officials had seen the Predator video of the "man in white."Sent 17: On July 11, Hadley tried to hurry along preparation of the armed system.
Sent 18: He directed McLaughlin, Wolfowitz, and Joint Chiefs Vice Chairman Richard Myers to deploy Predators capable of being armed no later than September 1.
Question: What did the CIA not want to pay for? (A) The cost of a Predator that went down/was destroyed (B) More tanks (C) Pay for (D) The predator.

Ex Output:
A, D.

Ex Input:
Paragraph- Sent 1: Jack and Mackenzie wanted to do something fun during their day off from school.
Sent 2: They knew that the library had story time on Monday, Tuesday, and Wednesday.
Sent 3: Their mother told them they could go to the library every Tuesday for their story time.
Sent 4: They packed up the car and drove to the library, ready for a fun morning.
Sent 5: When they arrived to the story room, there were lots of other children their age, all sitting cross-legged and ready for the story of the day.
Sent 6: The teacher told them they would be reading "The Wild Horse".
Sent 7: She began to tell the story of Majestic, the wild horse who could not be calmed.
Sent 8: His people had tried and tried to break him, but he was wild at heart.
Sent 9: Every time they took him to the river to drink, he would run straight into the water and get soaking wet!
Sent 10: He would splash and play until he was ready to go back home, where he would sleep for hours, having worn himself out playing.
Question: What would Majestic do when brought to the river to drink? (A) Get in the water (B) Run away from the people (C) Run along the river (D) Get soaking wet (E) Calmly drink water (F) He would run straight into the water and get soaking wet.

Ex Output:
A, D, F.

Ex Input:
Paragraph- Sent 1: Rivers flowing over gentle slopes move more slowly.
Sent 2: They move much more slowly than a mountain stream.
Sent 3: These slow moving streams create different types of features than mountain streams.
Sent 4: Slow moving water erodes the sides of their channels more than the bottom.
Sent 5: Also, large curves in the stream form.
Sent 6: These curves are called meanders.
Sent 7: Meanders are caused by erosion and deposition.
Sent 8: Remember, faster moving water causes erosion more quickly.
Sent 9: Slower moving water erodes material more slowly.
Sent 10: If water is moving slowly enough, the sediment being carried may settle out.
Sent 11: This settling out, or dropping off, of sediment is deposition.
Sent 12: The curves are called meanders because they slowly wander over the land.
Sent 13: As meanders erode from side to side, they create a floodplain.
Sent 14: This is a broad, flat area on both sides of a river.
Sent 15: Eventually, a meander may become cut off from the rest of the river.
Sent 16: This forms an oxbow lake.
Question: Do meanders cause oxbow lakes? (A) When they are cut off from the rest of the river (B) Maybe (C) Yes.

Ex Output:
A, C.