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 thinner wire is more difficult for electrons to move through than a thicker wire.
 Question: If you use a thin piece of wire then electrons move 
 Choices: A)easier 
B)harder
harder

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 Shane goes swimming in warmer water, he can move about quickly, whereas in cooler water, Shane's movement is 
 Choices: A)faster 
B)slower
slower

Paragraph: Compared with a less powerful device, a more powerful device can either do more work in the same time or do the same work in less time.
 Question: When you use a 1 horsepower drill instead of a 2 horsepower drill it is 
 Choices: A)more powerful 
B)less powerful
less powerful