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: Sally is pulling two wagons. The red wagon is full of sand, and the blue wagon is empty. The wagon that will be easier to pull is the 
 Choices: A)red wagon 
B)blue wagon
blue wagon