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: For a given medium, sound has a slower speed at lower temperatures.
 Question: If Jim turns the thermostat down in his room while listening to music, what will happen to the speed of the sound waves in the room? 
 Choices: A)they will speed up 
B)they will slow down
they will slow down

Paragraph: The pupil automatically gets bigger or smaller to let more or less light in as needed.
 Question: Jim looked at his cat's eyes on a bright sunny day, then he looked at the eyes when the cat was in very low light inside the house. In the low light condition, the cat's pupils well be 
 Choices: A)smaller. 
B)larger
larger

Paragraph: The longer the resistor, the more resistance it has.
 Question: Terry adds a longer resistor to the circuit. The resistor offer _____ than the other one. 
 Choices: A)more 
B)less
more