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).

Q: Paragraph: The more tightly packed the particles inside the material are, the more dense we say they are.
 Question: Sasha is throwing bottles into the lake. Some bottles are filled with sand, and some only have a tiny bit of sand in them. The bottles with a tiny bit of sand will sink last because they are 
 Choices: A)less dense 
B)more dense

A: less dense
****
Q: Paragraph: The greater the objects mass, the greater the force of attraction; in addition, the greater the distance between objects, the smaller the force of attraction.
 Question: A rock has more mass than a pebble. Which object will exhibit a smaller force of attraction? 
 Choices: A)rock 
B)pebble

A: pebble
****
Q: Paragraph: The development of better missiles fostered better rocket technologies.
 Question: If Mona works in a defense lab and her company develops worse missiles, what happens to the advancement of rocket technologies? 
 Choices: A)decreases 
B)increases

A:
decreases
****