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.
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Question: 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.

Answer: A, B, C, F.

Question: Paragraph- Sent 1: Sally had a very exciting summer vacation.
Sent 2: She went to summer camp for the first time.
Sent 3: She made friends with a girl named Tina.
Sent 4: They shared a bunk bed in their cabin.
Sent 5: Sally's favorite activity was walking in the woods because she enjoyed nature.
Sent 6: Tina liked arts and crafts.
Sent 7: Together, they made some art using leaves they found in the woods.
Sent 8: Even after she fell in the water, Sally still enjoyed canoeing.
Sent 9: She was sad when the camp was over, but promised to keep in touch with her new friend.
Sent 10: Sally went to the beach with her family in the summer as well.
Sent 11: She loves the beach.
Sent 12: Sally collected shells and mailed some to her friend, Tina, so she could make some arts and crafts with them.
Sent 13: Sally liked fishing with her brothers, cooking on the grill with her dad, and swimming in the ocean with her mother.
Sent 14: The summer was fun, but Sally was very excited to go back to school.
Sent 15: She missed her friends and teachers.
Sent 16: She was excited to tell them about her summer vacation.
Question: How did Sally feel about returning to school, and how did she feel about telling her friends and teachers about her summer vacation (A) Sally was excited to go back to school, and she was excited to tell her friends and teachers about her summer vacation (B) She was excited to go back to school and missed her friends and teachers and wanted to tell them about her summer vacation (C) She was sad to go back to school but was excited to tell her friends and teachers about her summer vacation.

Answer: B.

Question: 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: At what point does chemical digestion start? (A) Once you swallow the food (B) When it enters the small intestine (C) As your small intestine starts to chew your food (D) When you start chewing (E) When it enters the mouth (F) When it enters the stomach (G) When you chew the food.

Answer:
A, D.