instruction:
You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).
question:
Paragraph: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.
 Question: If Jim eats animals that are lower on the food chain, the amount of toxic metals that enter his body are 
 Choices: A)greater 
B)smaller
answer:
smaller


question:
Paragraph: Water density increases as salinity and pressure increase, or as temperature decreases.
 Question: By removing a pound of salt from a bucket of fresh water, could you cause the density of the water to 
 Choices: A)increase 
B)decrease?
answer:
decrease?


question:
Paragraph: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.
 Question: A halving of carbon atoms in a hydrocarbon will cause _____ isomers. 
 Choices: A)more 
B)less
answer:
less