Problem:OPTIONS:
- Enzymes
- magnesium
- Relieve pain
- folic acid
- Proteins
- nutrients
- B
- vitamin C

You are presented with the quiz "what vitamin is beneficial to wounds?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "zinc has a positive impact on the healing of wounds" and "vitamin C and zinc seem to enhance wound healing". So, what's the best answer to the question?
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A: vitamin C

Problem:OPTIONS:
- salamanders
- animals
- respiration
- gastropod shells
- fish
- h2o
- insects
- it needs them

You are presented with the quiz "what breathes with gills as larvae and lungs as adults?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most amphibians breathe with gills as larvae and with lungs as adults" and "salamanders are a type of amphibian". So, what's the best answer to the question?
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A: salamanders

Problem:OPTIONS:
- hyperthyroidism
- aggressive
- hormones
- humans
- bullfrogs
- hypothyroidism
- similar
- some mammals

You are presented with the quiz "What sort of behavior can cause fight-or-flight responses?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "threatening behavior causes a fight-or-flight response in animals" and "if a pony feels threatened it can respond with aggressive behavior". So, what's the best answer to the question?
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A: aggressive

Problem:OPTIONS:
- water vapor
- element
- salt and water.
- heater
- evaporation
- fur and fat
- aqueous solution
- sheet

You are presented with the quiz "What is used to cool the body when it is hot?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when the body is hot , sweat is produced to cool the body" and "sweat is released from sweat glands beneath the skin, and as it evaporates, the skin is cooled". So, what's the best answer to the question?
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A:
evaporation