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 sunscreen with a higher SPF value protects the skin longer.
 Question: John was analyzing some of the results from his sunscreen study. He found that a lower SPF protects the skin 
 Choices: A)Shorter 
B)Longer
Shorter

Paragraph: Its harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor.
 Question: Fred was moving a desk across the room. He then pushed a chair and it was much easier. This is because the lighter chair had _____ friction with the floor. 
 Choices: A)less 
B)more
less

Paragraph: Different types of rocks weather at different rates. More resistant types of rocks will remain longer.
 Question: RJ diamond is more resistant to weathering while Tony has some sandstone which is less resistant to weathering. Whose rock will likely last longer? 
 Choices: A)RJ's 
B)Tony's
RJ's