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).

[EX Q]: 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 ball is _____ dense than the rock. 
 Choices: A)less 
B)more
[EX A]: less

[EX Q]: Paragraph: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.
 Question: Ray was traveling in rocket leaving orbit. He keeps the empty fuel containers on board so the ship can fly 
 Choices: A)higher 
B)lower
[EX A]: lower

[EX Q]: Paragraph: The more current, the stronger the electromagnet.
 Question: Dan was excited to try out an electromagnet and was happy when it was very effective. He knew however that if he changed the current he could make it weaker. How should he adjust the current? 
 Choices: A)decrease it 
B)increase it
[EX A]:
decrease it