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: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.
 Question: DJ has a solution that he adds particles to. The solution is now a _____ concentration. 
 Choices: A)higher 
B)lower
higher

Paragraph: Smaller sediments are dropped as the slope becomes less steep.
 Question: Dan is watching sand fall down a small hill. The pieces of sand will be very 
 Choices: A)large 
B)small
small

Paragraph: The farther the sound waves travel away from the source, the more spread out their energy becomes.
 Question: As you monitor sound waves closer to a speaker they become 
 Choices: A)louder 
B)quieter

louder