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: As animals grow their bones get longer and bigger, they grow more hair, and are able to take care of themselves by getting food, shelter, and water.
 Question: Scuffy was a puppy, and now he is a dog. Now that Scruffy is bigger, longer, and furrier than before, Scrufffy can take care of himself 
 Choices: A)better 
B)worse
better

Paragraph: For a given medium such as air, sound has a slower speed at lower temperatures.
 Question: If Mary is blowing an air horn underwater and she lowers the temperature of the water, what will happen to the speed of the sound waves generated by the air horn? 
 Choices: A)increase 
B)decrease
decrease

Paragraph: In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.
 Question: If Jim has a container of hydrogen gas that is 40 liters in volume and he moves the gas to a container that is 50 liters in volume, what happens to the density of the gas? 
 Choices: A)increases 
B)decreases

decreases