Given the task definition and input, reply with output. 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: The full box is harder to move because it has greater mass and therefore greater inertia.
 Question: When something is very heavy and starts moving what level of energy does it have? 
 Choices: A)high 
B)low
high