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: Electromagnetic waves with shorter wavelengths have higher frequencies and more energy.
 Question: If we find an electromagnetic wave with very short wavelengths, it will likely have _____ energy. 
 Choices: A)much 
B)little
[A]: much


[Q]: Paragraph: Wave frequency can be measured by counting the number of crests or compressions that pass the point in 1 second or other time period. The higher the number is, the greater is the frequency of the wave.
 Question: If there are less crests coming through, there will be _____ wave frequency. 
 Choices: A)more 
B)less
[A]: less


[Q]: Paragraph: Air pressure is less at higher elevations.
 Question: We don't need oxygen masks when we descend Everest because the air pressure is 
 Choices: A)low 
B)high
[A]:
high