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 main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.
 Question: When you go into a cave, the rocks at deeper levels are _____ than the rocks on the surface. 
 Choices: A)younger 
B)older
older

Paragraph: More pollutants mean poorer air quality.
 Question: You would find better air near a 
 Choices: A)factory 
B)wooded area.
wooded area.

Paragraph: Exercising muscles increases their size, and bigger muscles have greater strength.
 Question: Brad wants to go to the gym more regularly, so that his muscles will get larger. Another aspect of having larger muscles means that Brad will likely be 
 Choices: A)stronger 
B)weaker

stronger