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: A: The more carbon atoms there are, the greater the number of possible arrangements of carbon atoms.
 Question: If Mona is manipulating carbon atoms in her science lab and she increases the number of carbon atoms she has to work with, what happens to the number of possible arrangements the carbon atoms can take? 
 Choices: A)increase 
B)decrease
increase

Paragraph: Bases have pH values above 7. The higher the pH value, the more strongly basic the substance.
 Question: If Mona is filling her pool with chemicals to change the pH level of the water and she decreases the pH, what happens to the baseness of the water? 
 Choices: A)increase 
B)decrease
decrease

Paragraph: Water flowing over a steeper slope moves faster and causes more erosion.
 Question: Mona is a scientist studying erosion at a university. She is observing a river. If she starts taking erosion measurements at the mouth of the river and moves up to the head of the river, what will she find happens as the slope gets steeper? 
 Choices: A)erosion decreases 
B)erosion increases

erosion increases