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).
--------
Question: 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

Answer: higher


Question: Paragraph: When we add resistors in parallel to each other the total resistance decreases and the current increases.
 Question: Eric adds resistors in parallel to a circuit. The total current 
 Choices: A)increases 
B)decreases

Answer: increases


Question: Paragraph: Because all electromagnetic waves travel at the same speed through space, a wave with a shorter wavelength must have a higher frequency, and vice versa.
 Question: John was looking at the magnetic reader in the lab. What he observed was that as a wave with a shorter wavelength traveled, the frequency became 
 Choices: A)Lower 
B)Higher

Answer:
Lower