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.

Input: Consider Input: Paragraph- Sent 1: When a stream or river slows down, it starts dropping its sediments.
Sent 2: Larger sediments are dropped in steep areas.
Sent 3: Some smaller sediments can still be carried by a slow moving stream or river.
Sent 4: Smaller sediments are dropped as the slope becomes less steep.
Sent 5: Alluvial Fans In arid regions, a mountain stream may flow onto flatter land.
Sent 6: The stream comes to a stop rapidly.
Sent 7: The deposits form an alluvial fan.
Sent 8: Deposition also occurs when a stream or river empties into a large body of still water.
Sent 9: In this case, a delta forms.
Sent 10: A delta is shaped like a triangle.
Sent 11: It spreads out into the body of water.
Question: What might you find when a mountain stream flows onto flatter land and comes to a rapid stop in arid regions? (A) Delta (B) Drop off (C) Sand bar (D) Alluvial Fans (E) Deposits.

Output: D.

Input: Consider Input: Paragraph- Sent 1: Sometimes traits can vary from parent to offspring.
Sent 2: These changes are due to mutations.
Sent 3: Mutations are a random change.
Sent 4: Mutations are natural.
Sent 5: Some mutations are harmful.
Sent 6: In this case, the organism may not live to reproduce.
Sent 7: The trait will not be passed onto offspring.
Sent 8: Others variations in traits have no effect on survival.
Sent 9: Can some mutations be good for a living thing?
Sent 10: Other mutations can have great benefits.
Sent 11: Imagine being the first moth that can blend into its background.
Sent 12: It would have a better chance of survival.
Sent 13: A living thing that survives is likely to have offspring.
Sent 14: If it does, it may pass the new trait on to its offspring.
Sent 15: Thats good news for the offspring.
Sent 16: The offspring may be more likely to survive.
Sent 17: Mutations are one way living things adapt to new conditions.
Question: Are mutations always harmful? (A) No (B) No, they can also benefit a living being (C) Yes.

Output: A, B.

Input: Consider Input: Paragraph- Sent 1: The world can be divided into three climate zones.
Sent 2: The first climate zone is the polar zone.
Sent 3: As it sounds, the polar zone is near earths poles.
Sent 4: The polar zone has very long and cold winters.
Sent 5: Brrr!!!!
Sent 6: Near the equator is the tropical zone.
Sent 7: The tropical zone is known for being hot and wet.
Sent 8: Between these two zones is the temperate zone.
Sent 9: Temperatures there tend to be mild.
Sent 10: Its not too hot and not too cold.
Sent 11: You might expect places near the equator to be hot and wet.
Sent 12: Thats not always the case.
Sent 13: Sometimes there are other factors at work.
Sent 14: These factors can affect the local climate type or a region.
Sent 15: Oceans and mountain ranges can have a major impact.
Sent 16: They can greatly influence the climate of an area.
Sent 17: Many factors influence an areas climate.
Question: What is the tropical zone known for? (A) Mild Temperatures (B) Snow (C) Being dry and hot (D) Wet (E) Being hot and wet (F) Hot.
Output: D, E, F.