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).

[Q]: Paragraph: More pollutants mean poorer air quality.
 Question: When a river gets emptied of a lot of waste chemicals it becomes 
 Choices: A)cleaner 
B)dirtier
[A]: cleaner


[Q]: Paragraph: When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction.
 Question: If you spend a lot of time working out your muscles will be 
 Choices: A)smaller 
B)larger
[A]: larger


[Q]: Paragraph: The darker the urine, the less water it contains.
 Question: Joe's urine was almost clear; its water content was probably 
 Choices: A)high 
B)low
[A]:
high