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).

Q: Paragraph: For a given medium such as air, sound has a slower speed at lower temperatures.
 Question: If Mary is blowing an air horn underwater and she raises the temperature of the water, what will happen to the speed of the sound waves generated by the air horn? 
 Choices: A)increase 
B)decrease

A: increase
****
Q: Paragraph: As the Universe expands, galaxies move further and further apart.
 Question: When a city expands the distance across the city 
 Choices: A)decreases 
B)increases

A: increases
****
Q: Paragraph: However, the energy is diluted as an electromagnetic wave travels farther from its source because it spreads out over an ever-larger area.
 Question: Eric sends out an electromagnetic wave. Reid is 10 feet away and Will is 40 feet away. Who would have the stronger reading of the wave? 
 Choices: A)Will 
B)Reid

A:
Reid
****