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 more tightly packed the particles inside the material are, the more dense we say they are.
 Question: Eric has a soccer ball and kicks it into a rock of roughly the same size. The rock doesn't move and the ball bounces away. The rock is _____ dense than the ball. 
 Choices: A)less 
B)more
more