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).

Paragraph: The higher the pH value is, the stronger the base.
 Question: If Jim increases the pH value of his swimming pool, the base becomes 
 Choices: A)stronger 
B)weaker
stronger

Paragraph: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.
 Question: What happens when we head towards the core of the earth? 
 Choices: A)temperatures decrease 
B)temperatures increase
temperatures increase

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

cleaner