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 Q]: Paragraph- Sent 1: Heat supplies the energy that causes motion.
Sent 2: The deeper you go into toward the Earths core, the hotter it gets.
Sent 3: At the core it is really hot.
Sent 4: All that heat tries to rise toward the surface.
Sent 5: In the Mantle, the rock is partially melted and is able to move.
Sent 6: As it is heated, the material in the mantle moves toward the surface.
Sent 7: As the mantle material rises, it cools.
Sent 8: When it reaches the Earths crust, it is mostly stopped.
Sent 9: A little of the material can break through the surface, but not all.
Sent 10: Instead, it begins to move horizontally.
Sent 11: The mantle material moves horizontally away from a mid-ocean ridge crest.
Sent 12: Toward the surface, the mantle material starts to cool.
Sent 13: As it cools it sinks back down into the mantle.
Sent 14: These areas are where deep sea trench occur.
Sent 15: The material sinks back down to the core.
Sent 16: The system operates like a giant conveyor belt.
Sent 17: The motion due to heating and cooling is called convection.
Question: Does rock move more at the surface of the earth or at its core? (A) At the surface because there is more space (B) At the Surface (C) At its core because it has more heat (D) At its core.
[EX A]: C, D.

[EX Q]: Paragraph- Sent 1: As food is pushed along, it undergoes digestion.
Sent 2: Digestion is the process of breaking down food into nutrients.
Sent 3: There are two types of digestion: mechanical digestion and chemical digestion.
Sent 4: Mechanical digestion occurs when large chunks are turned into smaller chucks.
Sent 5: Perhaps not surprisingly, this happens when you chew your food.
Sent 6: Once you swallow the food, your stomach also does some of this work.
Sent 7: Chemical digestion occurs when food is broken down into useful nutrients.
Sent 8: This is a chemical process that begins as you start to chew your food.
Sent 9: The saliva in your mouth starts this process.
Sent 10: Once you swallow, the acid in your stomach further breaks down food.
Sent 11: From the stomach, the foods moves into the small intestine.
Sent 12: In the small intestines, another set of chemicals goes to work.
Sent 13: Are you surprised?
Sent 14: Your small intestine, and not your stomach, does most of the work!.
Question: What is chemical digestion, and where does it occur? (A) It occurs in the stomach (B) Food is broken down into useful nutrients (C) Occurs when food is broken down into useful nutrients, it occurs in the stomach and mouth (D) When food debris is passed out of the body, digestive track (E) When oxygen is separated from the air we breathe, in the lungs (F) Occurs when food is broken down into useful nutrients in the mouth, stomach, and small intestines (G) Occurs in the mouth (H) Large chunks are turned into smaller chucks (I) When large chunks of food are reduced to small chunks in the mouth.
[EX A]: A, B, C, F.

[EX Q]: Paragraph- Sent 1: Zinni feared that Bin Laden would in the future locate himself in cities, where U.S. missiles could kill thousands of Afghans.
Sent 2: He worried also lest Pakistani authorities not get adequate warning, think the missiles came from India, RESPONSES TO AL QAEDA'S INITIAL ASSAULTS 135 and do something that everyone would later regret.
Sent 3: Discussing potential repercussions in the region of his military responsibility, Zinni said, "It was easy to take the shot from Washington and walk away from it.
Sent 4: We had to live there."Sent 5: Zinni's distinct preference would have been to build up counterterrorism capabilities in neighboring countries such as Uzbekistan.
Sent 6: But he told us that he could not drum up much interest in or money for such a purpose from Washington, partly, he thought, because these countries had dictatorial governments.
Sent 7: After the decision-in which fear of collateral damage was an important factor- not to use cruise missiles against Kandahar in December 1998, Shelton and officers in the Pentagon developed plans for using an AC-130 gunship instead of cruise missile strikes.
Sent 8: Designed specifically for the special forces, the version of the AC-130 known as "Spooky"can fly in fast or from high altitude, undetected by radar; guided to its zone by extraordinarily complex electronics, it is capable of rapidly firing precision-guided 25, 40, and 105 mm projectiles.
Sent 9: Because this system could target more precisely than a salvo of cruise missiles, it had a much lower risk of causing collateral damage.
Sent 10: After giving Clarke a briefing and being encouraged to proceed, Shelton formally directed Zinni and General Peter Schoomaker, who headed the Special Operations Command, to develop plans for an AC-130 mission against Bin Laden's headquarters and infrastructure in Afghanistan.
Sent 11: The Joint Staff prepared a decision paper for deployment of the Special Operations aircraft.
Sent 12: Though Berger and Clarke continued to indicate interest in this option, the AC-130s were never deployed.
Sent 13: Clarke wrote at the time that Zinni opposed their use, and John Maher, the Joint Staff 's deputy director of operations, agreed that this was Zinni's position.
Sent 14: Zinni himself does not recall blocking the option.
Sent 15: He told us that he understood the Special Operations Command had never thought the intelligence good enough to justify actually moving AC-130s into position.
Sent 16: Schoomaker says, on the contrary, that he thought the AC-130 option feasible.
Sent 17: The most likely explanation for the two generals' differing recollections is that both of them thought serious preparation for any such operations would require a long-term redeployment of Special Operations forces to the Middle East or South Asia.
Sent 18: The AC-130s would need bases because the aircraft's unrefueled range was only a little over 2,000 miles.
Question: Did Schoomaker claim the AC-130 to be expensive or feasible? (A) Feasible (B) Expensive.
[EX A]:
A.