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: Acids have pH values below 7. The lower the pH value, the more strongly acidic the substance.
 Question: You can find tables that show the pH value of different fruits and vegetables. The fruits such as oranges are very acidic so they have a pH value that is 
 Choices: A)higher 
B)lower

A: lower
****
Q: Paragraph: A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.
 Question: John's company committed to increase greenhouse gas production worldwide. What likely happens to the global temperature in the future as a result? 
 Choices: A)it will increase 
B)it will decrease

A: it will increase
****
Q: Paragraph: Lower rock layers were laid down earlier, so they are assumed to contain older fossils.
 Question: Gerald laid down many rock layers. The layers on the top level were likely laid 
 Choices: A)first 
B)last

A:
last
****