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: People in the richer nations of the world use far more energy, especially energy from fossil fuels, than people in the poorer nations do.
 Question: Will was farming in a rich country when he noticed he his energy consumption was high. Despite this, his consumption of energy is likely much _____ than that of a poor country. 
 Choices: A)lesser 
B)greater
greater

Paragraph: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.
 Question: When we raise the temperature of water it becomes 
 Choices: A)less dense 
B)more dense
less dense