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: 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.
water

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
pebble

Paragraph: The more curved the surface of a lens is, the more it refracts the light that passes through it.
 Question: Terry had a glass lens that he made less curved over time. The lens now reflects _____ light. 
 Choices: A)more 
B)less
less