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).

Input: Consider Input: Paragraph: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.
 Question: Ian sees an object with few colliding particles, and he compares it to another object with few colliding particles. Which is true about the objects? 
 Choices: A)the object with many colliding particles has a lower concentration of particles 
B)the object with many colliding particles has a higher concentration of particles

Output: the object with many colliding particles has a lower concentration of particles


Input: Consider Input: Paragraph: At higher elevations, there is less air to press on a given area.
 Question: When we get to the bottom of a mountain the air is 
 Choices: A)more dense 
B)less dense

Output: more dense


Input: Consider Input: Paragraph: If blood volume in the body decreases, blood pressure decreases.
 Question: When there is less fluid in a tube the pressure in the tube 
 Choices: A)increases 
B)decreases


Output: decreases