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: This is also called diffusion, and the process is much faster in gases than in liquids, because the particles in gases are further apart.
 Question: Diffusion occurs slower in 
 Choices: A)water 
B)oxygen.

A: water
****
Q: Paragraph: An object has greater momentum if it has greater mass, greater velocity, or both.
 Question: If an big eighteen wheeler and a small wagon are both rolling down a small hill, which has less momentum? 
 Choices: A)small wagon 
B)eighteen wheeler

A: small wagon
****
Q: Paragraph: Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.
 Question: High frequency bass notes have what length wavelengths 
 Choices: A)long 
B)short

A:
short
****