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.
One example: Paragraph- Sent 1: Obama was born on August 4, 1961, at Kapiʻolani Maternity & Gynecological Hospital in Honolulu, Hawaii.
Sent 2: He is the only President to have been born in Hawaii.
Sent 3: He was born to a white mother and a black father.
Sent 4: His mother, Ann Dunham (1942-1995), was born in Wichita, Kansas, of mostly English descent, with some German, Irish, Scottish, Swiss, and Welsh ancestry. Question: How old was Obama's mother when he was born? (A) teenager (B) in his 40s (C) mid 20s (D) almost twenty.
Solution is here: D.
Explanation: Obama was born in 1961. His mother was born in 1942 and 1961-1942=19. Therefore, "almost twenty" answers the question sufficiently.

Now, solve this: 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: In what year is Orion expected to launch? (A) Three  years (B) 2011 (C) 2014 (D) 2012 (E) 2010 (F) 2018.
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
C.