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: (CNN) -- The U.S. space shuttle program retired in 2011, leaving American astronauts to hitchhike into orbit.
Sent 2: But after three long years, NASA's successor is almost ready to make an entrance.
Sent 3: Orion, the agency's newest manned spaceship, is being prepared for its first mission in December.
Sent 4: In future missions, it will journey into deep space -- to Mars and beyond -- farther than humans have ever gone before.
Sent 5: Orion comes loaded with superlatives.
Sent 6: It boasts the largest heat shield ever built and a computer 400 times faster than the ones on the space shuttles.
Sent 7: It will be launched into space on the most powerful rocket NASA has ever made.
Sent 8: No astronauts will be aboard the December flight, which will test the spacecraft's systems for future manned missions.
Sent 9: Final work on the spacecraft is under way at the Kennedy Space Center in Florida.
Sent 10: Orion came one step closer to completion this month with the stacking of the crew module atop the service module.
Sent 11: "Now that we're getting so close to launch, the spacecraft completion work is visible every day," Orion Program Manager Mark Geyer said in a statement.
Sent 12: A 3,600-mile journey When complete, the Orion capsule will resemble a fencing foil, with a tall spire shooting up from a rounded base.
Sent 13: At the top will sit a launch abort system, with downward-facing thrusters that would save the crew from a jarring crash in the event of a rocket malfunction.
Sent 14: The bottom portion, the service module, will perform various functions such as in-space propulsion and cargo storage.
Sent 15: Nestled between the two will be the crew module, capable of supporting human life from launch until recovery.
Sent 16: Attached to the service module will be a United Launch Alliance Delta IV Heavy rocket.
Sent 17: For the first time since the space shuttle's debut launch in 1981, the crew compartment will ride on the tip of the rocket rather than hanging onto its side, evoking the configuration of the famous Apollo or Gemini missions.
Question: What is NASA's new spaceship called? (A) Gemeni (B) Orion (C) Delta IV (D) Space shuttle (E) Apollo.

Ex Output:
B.

Ex Input:
Paragraph- Sent 1: Gravitational Potential Energy is affected by position.
Sent 2: Like the leaves on trees, anything that is raised up has the potential to fall.
Sent 3: It has potential energy.
Sent 4: You can see examples of people with gravitational potential energy in 1.5 Figure below.
Sent 5: Gravitational potential energy depends on two things.
Sent 6: It depends on its weight, because a large falling rock can do more damage than a leaf falling from a tree.
Sent 7: It also depends on its height above the ground.
Sent 8: Like the skateboarder, the higher the ramp, the faster he will be going when he reaches the bottom.
Sent 9: Like all energy, gravitational potential energy has the ability to do work.
Sent 10: In this case, weight has the potential to deliver a force.
Sent 11: More important for us is that it has the ability to cause change.
Sent 12: What kind of change you may ask?
Sent 13: Gravitational potential energy has the ability to cause motion.
Question: What is the most important change gravitational potential energy can have? (A) The ability to cause motion (B) Motion (C) Friction (D) Deliver make skateboarders move.

Ex Output:
A, B.

Ex Input:
Paragraph- Sent 1: Also on Feb. 12, a week before the ice dancing finals, Tokhtakhounov told Anissina's mother in a telephone call that the Russian federation official "had called me from America" to assure that "we are going to make" Anissina "an Olympic champion."Sent 2: He told her that the Russian skating federation official "will help -- he has two or three judges."Sent 3: On or about March 7, in a conversation between Tokhtakhounov and Anissina, she said she would have won the event without his assistance because the Russian judge did not vote for her and her partner.
Sent 4: She also apologized for not calling to thank him earlier, but that Gailhaguet had forbidden her.
Sent 5: She told Tokhtakhounov that she knew the FBI had interviewed Gailhaguet because of information that Tokhtakhounov "was involved with the results" of the ice dancing.
Sent 6: He assured her that it was nonsense, but that Gailhaguet "knows my name very well -- he tried to help me, and later he made stuff up to scare you so you would not connect me to him even more."Sent 7: The conversations seem to indicate a familiarity between Tokhtakhounov and Anissina.
Sent 8: Tass, the official Russian news agency, reported that Anissina attended a ceremony in 1999 at a Paris hotel honoring Tokhtakhounov for his philanthropy.
Sent 9: That Russian organized crime may have infiltrated international sport at the Olympics stunned Phyllis Howard, president of the U.S. Figure Skating Association.
Sent 10: "This is a criminal act and it certainly puts things in a different league," Howard said.
Sent 11: Lloyd Ward, chief executive officer of the U.S. Olympic Committee, said in a statement, "Competitors from all nations must be assured that they compete on a level playing field.".
Question: Which news agency ran a story that implied Russian organized crime may have infiltrated international sport at the Olympics? (A) Russian Associated Press (B) U.S. Figure Skating Association (C) Stalingrad News (D) Tass (E) CNN World (F) Tass, the official Russian news agency (G) Russian Skating Federation.

Ex Output:
D, F.