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).

[EX Q]: Paragraph: The Earth travels faster in its elliptical orbit when it is closer to the Sun than when it is farther away.
 Question: If the Earth is orbiting the Sun and it begins to move closer to it, what happens the speed the Earth is moving? 
 Choices: A)increase 
B)decrease
[EX A]: increase

[EX 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
[EX A]: cleaner

[EX Q]: Paragraph: Rougher surfaces have more friction between them than smoother surfaces.
 Question: Eric rubs together tissue paper and then sandpaper. The rougher tissue paper has _____ friction than the sandpaper. 
 Choices: A)less 
B)more
[EX A]:
more