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: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.
 Question: David is getting ready to fly into space on a rocket. As the rocket shoots upwards, part of the mass attaches, allowing the rocket to go 
 Choices: A)higher 
B)lower
[A]: lower


[Q]: Paragraph: An object with greater mass or greater velocity has more kinetic energy.
 Question: Which object likely contains less energy? 
 Choices: A)a pinhead 
B)the sun
[A]: a pinhead


[Q]: Paragraph: An increase in predators, the emergence of a new disease, or the loss of habitat are just three possible problems that will decrease a population.
 Question: If there are a lot of wolves the deer population will 
 Choices: A)increase 
B)decrease
[A]:
decrease