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: Warming up exercises increases the blood flow to the muscles and increases the heart rate.
 Question: James spent 30 minutes exercising while Mary spent only 10 minutes exercising. Which person had the higher heart rate? 
 Choices: A)Mary 
B)James
James

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: Rocks that are buried very shallow are _____ than rocks on the surface. 
 Choices: A)newer 
B)older
newer

Paragraph: A sunscreen with a higher SPF value protects the skin longer.
 Question: Jimbo is going to the beach and he wants to ensure he has the highest sun protection for his skin. Should he wear a sunscreen with a higher SPF or a lower SPF? 
 Choices: A)higher SPF 
B)lower SPF

higher SPF