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: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.
Question: Mike is watching how particles of reactants function, and sees that they are very far apart. Considering that the concentration of them is very low, the chance of them colliding together is
Choices: A)high
B)low
low

Paragraph: A thinner wire is more difficult for electrons to move through than a thicker wire.
Question: If Jim is transmitting electricity through a wire and he reduces the size of that wire, the electrons move through it
Choices: A)easier
B)harder
harder